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Alcatel-Lucent 4A0-101Alcatel-Lucent Interior Routing Protocols and High Availability

Has a few tricky questions, but all the questions are real and there are enough correct answers to passthe exam. I scored l 86%.Thanks

I think it is a consistent training approach that leaves the candidate confident about his/her success inthe desire test.

I compared this dump with newer ones and this one is what you want to learn from.

This dump is reliable as well as reasonable.

Exam A

QUESTION 1What is the default preference value for a static route in the Alcatel-Lucent 7750 SR?

A. 0B. 5C. 10D. 15

Correct Answer: BSection: (none)Explanation

Explanation/Reference:answer is upgraded.

QUESTION 2In an OSPF Hello packet, which of the following fields must match for all neighbor routers on the segment?Choose three answers.

A. Area ID W B.B. Hello and Dead intervals PC.C. Stub flagD. Checksum valuesE. The list of neighbors

Correct Answer: ABCSection: (none)Explanation

Explanation/Reference:answer is real.

QUESTION 3Click the exhibit button.

The OSPF adjacency between routers R3 and R1 is down. What is the problem?

A. Area 1 of router R1 should not be configured as a stub.B. Router R3 has the incorrect authentication key type.C. Router R1 has the incorrect authentication key type.D. There is not enough information to tell.

Correct Answer: CSection: (none)Explanation

Explanation/Reference:Explanation:


Given the topology and the show commands, and assuming that router R2 advertises all of its loopbacksinto OSPF, what is the correct router R1 configuration?

A. Option AB. Option BC. Option CD. Option D

Correct Answer: ASection: (none)Explanation


QUESTION 5In which of the following types of areas does an OSPF router not set the E bit in its Type 1 LSA?


A. Not so stubby areaB. Stub areaC. Backbone areaD. Normal area




In the topology shown, router R1 is an ASBR configured to export external routes to OSPF. Which of thefollowing statements regarding the OSPF LSAs in the network is true?

A. Router R1 generates a type 5 LSA that is flooded through all OSPF areas.B. Router R1 generates a type 7 LSA that is flooded through all OSPF areas.C. Router R1 generates a type 5 LSA that is flooded through area 1. Router R2 generates a type 7 LSA

that is flooded through areas 0 and 2.D. Router R1 generates a type 7 LSA that is flooded through area 1. Router R3 generates a type 5 LSA

that is flooded through areas 0 and 2.

Correct Answer: DSection: (none)Explanation


QUESTION 7What is the protocol number for OSPF in the IP header?

A. OSPF uses TCP, so the protocol number is 6.B. OSPF uses UDP, so the protocol number is 17.C. OSPF does not use IP.D. OSPF has its own protocol number of 89.




Which of the following would correctly configure routers R2, R3, and R4?




QUESTION 9When are virtual links used in OSPF?

A. When two areas need to communicate and there is no area 0.B. When an area needs to traverse another area to reach area 0.C. When two areas are connected to area 0, but there is no direct path between them.D. When an area needs to connect directly to another area without using area 0.



QUESTION 10Which of the following statements regarding area border routers in an OSPF network is true?

A. The term backbone router has the same definition as the term area border router.B. An OSPF network needs at least one area border router to function.C. Area border routers connect the backbone area to other areas in an OSPF network.D. By definition, an area border router must perform route summarization between areas.


Explanation/Reference:answer is genuine.

QUESTION 11Which of the following correctly lists the 5 OSPF packet types?

A. Hello, link state update, link state packet, link State acknowledgement, database description.B. Link state update, link state refresh, link state acknowledgement, database description, notification.C. Hello, link state refresh, link state update, link state acknowledgement, link state authentication.D. Hello, link state update, link state request, link state acknowledgement, database description.



QUESTION 12Which of the following OSPF area types are supported by the Alcatel- Lucent 7750 SR? Choose twoanswers.

A. Not so stubby areasB. Level1 area WCC. Stub areasD. Partially stubby areasE. Level 2 areas

Correct Answer: ACSection: (none)Explanation


QUESTION 13If OSPF is used in a multi-area OSPF network, which of the following statements regarding routesummarization is true?

A. Manual route summarization can only be done on autonomous system border routers.B. Manual route summarization must be done on all the backbone routers to be effective. Manual route

summarization is optional on the routers in non-backbone areas.C. Manual route summarization is done on the ABRs. By default, automatic summarization is done;

however, it may not be optimal for all networks.D. Manual route summarization is done on the ABRs. By default, no route summarization is done and all

routes are advertised to all areas.




The OSPF packets shown have been exchanged between two neighbors. What state is the OSPFadjacency in?

A. The adjacency state is two way because both routers have received a database description packet.B. The adjacency is in the exchange state. The next step is to exchange link state request and link state

update packets.C. The adjacency is in the ex start state. The routers have exchanged database description packets, but

still have to negotiate the starting sequence number.D. The adjacency state is full. The routers are exchanging database description packets to notify each

other that all link state advertisements have been received.



QUESTION 15Which of the following best describes the type of packets used by OSPF routers to exchange updates on apoint-to-point link?

A. IP packets sent to an IP multicast address.B. TCP packets sent to an IP multicast address.C. IP packets sent to an IP unicast address.D. UDP packets sent to an IP multicast address.



QUESTION 16Which of the following statements best describes an OSPF type 3 LSA?

A. An OSPF type 3 LSA is an intra-area LSA, generated by the ABR only when route summarization isconfigured.

B. An OSPF type 3 LSA is an inter-area LSA, generated by the ABR only when route summarization isconfigured.

C. An OSPF type 3 LSA is an inter-area LSA, generated by an ASBR to describe external routes.D. An OSPF type 3 LSA is an inter-area LSA, generated by the ABR to describe a route to neighbors

outside the area.



QUESTION 17Which of the following types of networks are supported on an Alcatel-Lucent 7750 SR for OSPF? Choosetwo answers.

A. BroadcastB. Non-broadcast multi-accessC. Point-to-pointD. Point-to-multipoint



QUESTION 18If routers R1 and R2 have a Level 1 and Level 2 IS-IS adjacency, which of the following statements is true?Choose two answers.

A. Routers R1 and R2 are in different areas.B. Routers R1 and R2 are in the same area.C. Routers R1 and R2 will send a Level 1 Hello PDU and Level 2 Hello PDU, if the interface type between

them is point-to-point.D. Routers R1 and R2 will send a Level 1 Hello PDU and Level 2 Hello PDU, if the interface type between

them is broadcast.E. Routers R1 and R2 will send a Level 1/2 Hello PDU if the interface type between them is broadcast.

Correct Answer: BDSection: (none)Explanation


QUESTION 19Which of the following is an optional parameter when configuring IS-IS protocol on a router?

A. Configure IS-IS interfacesB. Enable IS-ISC. Configure level capabilitiesD. Specify an area address



QUESTION 20Which of the following features are supported by IS-IS? Choose three answers.

A. PDU authentication.B. The ability to customize the link cost metric.C. Use of Bellman-Ford routing algorithm.D. Classless routing.E. Updates sent as layer 3 multicast.

Correct Answer: ABDSection: (none)Explanation


QUESTION 21Which of the following statements regarding IS-IS LSPs is true?

A. There are three types of LSPs: L1, L2 and L1/L2.B. An LSP packet contains the ATT bits and the IS-type bits.C. The lower the LSP sequence number, the more current the update.D. Separate databases are maintained for L1 ,, L2, and L1/L2 LSPs.



QUESTION 22Which of the following statements regarding the IS-IS CSNP is false?

A. CSNPs are used to maintain consistency in the link state database.B. CSNPs are advertised before an adjacency is formed with another router.C. There are two types of CSNPs: Level 1 and Level 2.D. CSNPs are advertised after an adjacency is formed with another router.




In the IS-IS network shown, router R1 has been configured to summarize network 20.20.1.0/24 and20.20.2.0/24 as 20.20.0.0/16. Which router's routing table will be reduced compared to the routing tablebefore the summarization?

A. Router R1B. Router R2C. Routers R1 and R2D. Router R4



QUESTION 24What value should the AFI be set to for locally administered addressing?

A. 1B. 49C. 47D. 45E. 39


Explanation/Reference:


For the IS-IS network shown, and assuming point-to-point links, what adjacencies will router R1 establish?

A. L1/L2 adjacency with router R2.L1 adjacency with router R3

B. L2 adjacency with router R2L1 adjacency with router R3

C. L1/L2 adjacency with router R2L1/L2 adjacency with router R3

D. L1/L2 adjacency with router R2.L1 adjacency with router R4L1 adjacency with router R3



QUESTION 26Which of the following are similarities between OSPF and IS-IS? Choose two answers.

A. Metric is based on hop count.B. Slow convergence after link failures.C. Support hierarchy through the use of areas.D. Support for CIDR.E. Link state updates sent using layer 3 multicast.

Correct Answer: CDSection: (none)Explanation


QUESTION 27Which of the following statements regarding IS-IS Hello packets are true? Choose two answers.

A. Different types of Hello packets are exchanged on point-to-point networks than on broadcast networks.B. L1/L2 Hello packets are exchanged on broadcast links.C. Different L1 and L2 Hello packets are exchanged on broadcast links.D. By default, Hello packets are sent every 5 seconds, and the timeout to declare a neighbor down is 15

seconds.



QUESTION 28Which of the following types of network topologies are supported by IS-IS on the Alcatel-Lucent 7750 SR?Choose two answers.

A. Non-broadcastB. BroadcastC. Point-to-multipointD. Point-to-point




What is the state of adjacency?

A. InitializingB. UpC. DownD. 2-Way



QUESTION 30At what point is the LSP SRM flag cleared when an LSP is sent on an IS-IS point-to-point link?

Choose two answers.

A. As soon as the LSP is transmitted.B. When an acknowledgment is received in the form of PSNP.C. When an older LSP is received.D. When a newer or same aged LSP is received.E. Only when a newer LSP is received




Given the diagram below, what path will traffic follow from router R6 to router R3, and from router R3 torouter R6, if IS-IS is the routing protocol? The numbers beside the links are the metrics for that link.

A. Router R6 to router R3 will follow (R6-R5-R2-R3). Router R3 to router R6 will follow (R3- R2- R5-R6).B. Router R6 to router R3 will follow (R6-R5-R2-R3). Router R3 to router R6 will follow (R3-R4-R2- R5-R6).C. Router R6 to router R3 will follow (R6-R5-R2-R3). Router R3 to router R6 will follow (R3-R4-R7- R5-R6).D. Router R6 to router R3 will follow (R6-R5-R7-R4-R3). Router R3 to router R6 will follow (R3-R4- R7-R5-

R6).



QUESTION 32When IS-IS elects a DIS, what is used as the tie breaker on an Alcatel-Lucent 7750 SR, if the

priorities are the same?

A. The system ID.B. The loopback address.C. The sequence number of the Hello packet.D. The device that first initiated communication becomes the DISE. The highest interface MAC address.

Correct Answer: ESection: (none)Explanation


QUESTION 33Two IS-IS L1/L2 routers are in the same area on the same Ethernet segment. How many adjacencies willbe formed between them?

A. NoneB. 1C. 2D. 3E. 4



QUESTION 34In IS-IS, which of the following statements regarding an L1/L2 router is false?

A. An L1/L2 router can have neighbors in different areas.B. An L1/L2 router calculates separate SPF trees for the Level 1 and Level 2 topology.C. An L1/L2 router advertises its L2 routes to its L1 neighbors.D. An L1/L2 router sets the ATT bit in L1 LSPs to identify itself as an L1 router.



QUESTION 35How are IS-IS LSPs sent on point-to-point links?

A. They are sent using multicast MAC addresses 0180:0200:0014.B. They are sent using multicast MAC addresses 0180:c200:0015.C. They are sent using a unicast address.D. None of the above.



QUESTION 36Given the NSAP address of 49.0012.1234.1234.1234.00, what area does the IS-IS router reside in?

A. 49.0012.1234B. 49.0012

C. 12.1234D. 1234E. 49.1234



QUESTION 37Which type of IS-IS router is summarization most likely to be configured on?

A. L1 routersB. L2 routersC. L1/L2 routersD. L1 and L2 routers



QUESTION 38

Click the exhibit button.

Router R2 advertises the network 192.168.3.0/24 to router R1 via OSPF. A route policy has been

constructed to discard the route on router R1; however, it is not working. What is the problem?

A. The prefix list reject should be "192.168.3.0/16 exact".B. Router R1 should be configured as an OSPF "asbr".C. The policy "reject" should be set for import rather than export.D. The policy was likely not "committed" after creation.E. This is not possible because OSPF cannot use import policies.




If router R2 redistributes the IS-IS route to 192.168.3.0/24 into OSPF, router R3 preference of these tworoutes? Choose two answers.

A. The OSPF internal preferenceB. The IS-IS Level 1 internal preferenceC. The IS-IS Level 2 internal preferenceD. The OSPF external preferenceE. The IS-IS Level 2 external preferenceF. The IS-IS Level 1 external preference



QUESTION 40An Alcatel-Lucent 7750 SR receives a route via an IS-IS LSP with internal reach ability, and receives the

same route via an OSPF type 5 LSA. If al protocol preferences are default, which route will be installed inthe route table?

A. The route learned via IS-IS will be installed.B. The route learned via the OSPF type 5 LSA will be installed.C. Both routes will be installed, if ECMP is enabled.D. Both routes will be installed, regardless of whether ECMP is enabled.



QUESTION 41Which of the following cannot be used as a matching criterion in route policy statements?

A. Source IP addressB. TCP source portC. Prefix listD. Protocol type



QUESTION 42How many databases does a Link State routing protocol use?

A. OneB. TwoC. ThreeD. Four



QUESTION 43In an IP datagram, which field identifies the receiving application

A. The protocol field of the transport layer headerB. The port field of the transport layer headerC. The protocol field of the network layer headerD. The port field of the network layer address



QUESTION 44A static route is created using the command "static-route 0.0.0.0/0 next-hop 3.3.3.1". What command couldbe used to test the static route on an Alcatel-Lucent 7750 SR?

A. Ping static 3.3.3.1B. Ping static 0.0.0.0/0C. Ping 3.3.3.1D. Ping 0.0.0.0



QUESTION 45A static route is created using the command "static-route 2.3.4.0/24 next-hop 1.2.3.4". What is the correcttraceroute command to test this static route on an Alcatel-Lucent 7750 SR?

A. traceroute 2.3.4.1B. traceroute 2.3.4.0/24 next-hop 1.2.3.4C. traceroute next-hop 1.2.3.4D. traceroute does not work on the Alcatel-Lucent 7750 SR



QUESTION 46Which one of the commands below will create a static route to network 2.3.4.0/24 on the AlcatelLucent7750 SR router?

A. Static route 2.3.4.0 255.255.255.0 next hop 3.4.5.6B. Static-route next-hop 3.4.5.6 2.3.4.0/24C. Static route 2.3.4.0/24 next hop 3.4.5.6D. Static-route 2.3.4.0/24 next-hop 3.4.5.6




QUESTION 47A default route for a client is also known as the:

A. Default path

B. Default gatewayC. Gateway pathD. Proxy ARP



QUESTION 48What is the default preference value for a static route in the Alcatel-Lucent 7750 SR router?

A. 0B. 5C. 10D. 15



QUESTION 49What command could be used to verify proper configuration of a static route in an Alcatel-Lucent 7750 SRrouter?

A. Show route-tableB. Show router routing-tableC. Show router route-tableD. Show static



QUESTION 50What address is used when RIPv2 uses multicast to send its updates?

A. 224.0.0.5B. 224.0.0.6C. 224.0.0.9D. 224.0.0.10E. RIPv2 does not have support for multicast



QUESTION 51

What is the metric and maximum routable value for RIP?

A. Hop count and 16B. Hop count and 15C. Link cost and 15D. Link cost and 16



QUESTION 52What modes of authentication are supported for RIPv2 on the Alcatel-Lucent 7750 SR?

A. RIPv2 supports basic and MD5 authentication only.B. RIPv2 supports password and MD5 authentication only.C. RIPv2 does not support authentication, password and MD5 authentication.D. RIPv2 does not support authentication.



QUESTION 53Which of the following is NOT a characteristic of RIPv1?:

A. 30 second network updatesB. Classless routingC. Broadcast advertisementD. Poison Reverse



QUESTION 54What is the default inbound metric for RIP on the Alcatel-Lucent 7750 SR?

A. Whatever the advertised metric happens to be.B. A value of 1.C. This must be administratively set as there is no default value.D. A value of 15.



QUESTION 55Identify two attributes of Distance Vector Protocols: (Choose two)

A. Use split horizon by default.B. Send information about directly connected links to neighbors at periodic intervals.C. Use holddown timers when topologies change to allow for convergence.D. Maintain multiple databases: neighbor, topology and routing.



QUESTION 56Choose the Distance Vector Protocols from the list below:

A. OSPFB. RIPv1C. RIPv2D. IS-IS

Correct Answer: BCSection: (none)Explanation


QUESTION 57What must be configured on the Alcatel-Lucent 7750 SR for RIP to advertise locally attached links?

A. A policy statement within the router identifying what is to be advertisedB. Access-lists denoting what is to be advertisedC. Default metrics for each linkD. A group and neighbor statement for each peer



QUESTION 58In an OSPF environment, what must a router receive after it sends out an update?

A. The router must receive an acknowledgmentB. The router must receive a HelloC. The router must receive a new sequence numberD. The router must receive a Link State Packet



QUESTION 59An OSPF router receives an update in which the sequence number, age, and checksum are the same asthe entry already in the topological database. What action is taken by the router?

A. The link state information is not populated in the database but is forwarded to all neighborsB. The link state information already in the database is overwritten and the age is resetC. The link state information is not populated in the database and an acknowledgement is sentD. The link state information is regarded as old and nothing is done.



QUESTION 60From the list below select the statements that describe the behavior of link state information aging.(Choose 2)

A. The age for newly created link state information is set to 0 for OSPF and 1200 for IS-ISB. The age for newly created link state information is set to 1200 for OSPF and 0 for IS-ISC. The age is incremented or decremented as it is flooded from router to router and as it is held in the

topological database.D. The age is incremented or decremented only as it is held in the topological database and not as it is

flooded router to router.



QUESTION 61What are the three databases maintained by a Link State Protocol?

A. Neighbor, adjacency, route tableB. Neighbor, topology, forwardingC. Topology, routing, forwardingD. There are only two databases: adjacency and topology



QUESTION 62Which of the statements below best describes the pseudonode in an IS-IS network?

A. The DIS creates a logical node to represent a group of routers on the same non-broadcast network; thisnode is the pseudonode

B. The DIS creates a logical node to represent the topological database of the backbone network in an IS-IS network; this node is the pseudonode

C. The DIS creates a logical node to represent a broadcast sub-network; this node is the pseudonodeD. The DIS creates a logical node to represent the complete topology of an IS-IS area; this node is the

pseudode



QUESTION 63What command will show the IS-IS neighbors, and their status on an Alcatel-Lucent 7750 SR?

A. Show isis neighborsB. Show router isis neighborsC. Show router isis adjacencyD. Show isis adjacency



QUESTION 64What are the types of routers in an IS-IS topology? Choose all that apply.

A. Level 0B. Level 1C. Level 2D. Level 0/1E. Level 1/2

Correct Answer: BCESection: (none)Explanation


QUESTION 65What command allows analysis of the Dijkstra calculation on the Alcatel-Lucent 7750 SR?

A. There is no such calculation in IS-ISB. Show router isis databaseC. Show router isis dijykstraD. Show router isis spf



QUESTION 66What is the term used for the updates sent by IS-IS?

A. Link State PDUsB. Link State Updates

C. Link State AdvertisementsD. Intermediate System Update Packets



QUESTION 67What is the value of the protocol discriminator used to denote IS-IS protocol information?

A. 89B. 87C. 85D. 83



QUESTION 68What types of routers can an IS-IS L1 router form adjacencies with? Pick all that apply.

A. L1 routers in the same areaB. L1 routers in other areasC. L2 routers in the same areaD. L2 routers in other areasE. L1/L2 router in the same areaF. L1/L2 routers in other areas

Correct Answer: AESection: (none)Explanation


QUESTION 69What value should the AFI be set to for locally administered addressing?

A. 1B. 49C. 83D. 0



QUESTION 70What are the similarities between OSPF and IS-IS? Choose two.

A. Metric is cost basedB. Slow convergenceC. Automatic summarizationD. Support CIDR

Correct Answer: ADSection: (none)Explanation


QUESTION 71Exhibit

The following IS-IS packets have been exchanged between 2 adjacent IS-IS routers. What type ofadjacency will be formed?

A. An L1 adjacency will be formed.B. An L1/L2 adjacency will formedC. L2 adjacency will be formedD. No adjacency will be formed



QUESTION 72Which of the following best describes how IS-IS routers exchange updates on an Ethernet interface?

A. IS-IS routers exchange updates by sending UDP packets to a multicast address.B. IS-IS routers exchange updates using IP multicast packets.C. IS-IS routers exchange updates using Ethernet multicast packets.D. IS-IS routers exchange updates by sending packets to the subnet broadcast address.



QUESTION 73What acts as the tie breaker on an Alcatel-Lucent 7750 SR if the priorities are the same when IS- IS iselecting a DIS?

A. The system IDB. The loopback addressC. The sequence number of the hello packetD. The device that first initiated communication becomes the DIS



QUESTION 74How many bytes make up the system ID in an IS-IS NSAP address on the Alcatel-Lucent 7750 SR?

A. 4 bytesB. 6 bytesC. 8 bytesD. Variably between 4 and 8 bytes



QUESTION 75In an OSPF Hello packet what fields must match all neighbor routers on the segment? (Choose 3)

A. Area IDB. Hello and Dead IntervalsC. Stub flagD. DR and BDR addressesE. The list of neighbors



QUESTION 76What type of OSPF router generates a type 2 LSA?

A. Area Border RouterB. Autonomous System Boundary RouterC. Designated RouterD. All routers within an OSPF area.



QUESTION 77What is the default priority value used for electing the DR on an Alcatel-Lucent 7750 SR running OSPF onan Ethernet?

A. Priority of 0B. Priority of 1C. Priority of 64D. Priority of 255



QUESTION 78Which of the following statements regarding the election of the designated router (DR) by OSPF routers aretrue? (Choose two)

A. The router with the lowest priority is the DR.B. The router with the highest priority is the DR.C. If priorities are the same, the DR is chosen based on the lowest RID.D. If priorities are the same, the DR is chosen based on the highest RID.



QUESTION 79What are the types of networks supported on an Alcatel-Lucent 7750 SR for OSPF? (Choose 2)

A. BroadcastB. Non-Broadcast Multi-AccessC. Point-to-PointD. Point-to-Multipoint



QUESTION 80What are the ways the RID can be created on an Alcatel-Lucent 7750 SR router? (Choose three)

A. From the last 32 bits of the chassis MAC addressB. From the first 32 bits of the chassis MAC addressC. The loopback IP addressD. By using the command "config router ospf rid X.X.X.X"E. From the system IP addressF. From the highest interface IP address

Correct Answer: ADESection: (none)Explanation


QUESTION 81Exhibit

Given the two configurations shown, identify the two incorrect statements below: (Choose two)

A. Both routers will generate OSPF Hello packets.B. The system interface is missing in one configuration so OSPF will not operate correctly.C. The interface type settings differ, but OSPF will still operate correctly.D. Metric values differ, but this does not prevent OSPF operation.



QUESTION 82If a Router originates a type 1 router LSA with the E bit set what types of areas can it belong to? Select allthat apply.

A. Not So Stubby AreaB. Stub AreaC. Backbone AreaD. Standard Area

Correct Answer: ACDSection: (none)Explanation


QUESTION 83Which of the following statements regarding OSPF routing updates on a multi-access network segment istrue?

A. In multi-access networks, a DR and BDR are elected only if there are more than two routers connectedto the network segment.

B. In multi-access networks, a DR and BDR are elected only if the subnet masks on the router interfacesare less than /30

C. In multi-access networks, a DR and BDR are elected. To ensure resiliency, both the DR and BDR sendlink-state advertisements describing the network.

D. In multi-access networks, a DR and BDR are elected. The DR sends link-state advertisementsdescribing the network.



QUESTION 84An OSPF ASBR must have at least one interface in the backbone area (area 0)

A. TrueB. False



QUESTION 85The Alcatel-Lucent 7750 SR supports which two of the OSPF area types below?

A. Not So Stubby AreasB. Level 1 AreasC. Stub AreasD. Partially Stubby Areas



QUESTION 86What command will show the OSPF neighbors, and their status on the Alcatel-Lucent 7750 SR?

A. Show ospf neighborsB. Show router ospf neighborsC. Show router ospf adjacencyD. Show ospf adjacency



QUESTION 87Which of the LSA types stay within an OSPF area and are not exported outside of the area? (Choose allthat apply)

A. Router LSAB. Network LSAC. Summary Network LSAD. Summary Router LSA

Correct Answer: ABSection: (none)Explanation


QUESTION 88What is the source IP address in an OSPF update?

A. 224.0.0.5B. 224.0.0.6C. The unicast IP address of the interface the update is being sent on.D. The system address of the router

Correct Answer: C

Section: (none)Explanation


QUESTION 89NSSA LSA packets are what type within an NSSA area, and are converted to what other type at the ABR?

A. They are type 7 within the area and are not modified at the ABRB. They are type 5 within the area and converted to type 3 at the ABRC. They are type 5 within the area and are not modified at the ABRD. They are type 7 within the area and converted to type 5 at the ABR



QUESTION 90What best describes the type of packets used by OSPF routers to exchange updates on a pointto- pointlink?

A. IP packets sent to an IP multicast address.B. Ethernet frames sent to an Ethernet multicast address.C. IP packets sent to an IP unicast address.D. UDP packets sent to an IP multicast address.



QUESTION 91Graceful Restart is supported by what IGPs?

A. RIPv1 and RIPv2B. OSPFC. IS-ISD. BGP



QUESTION 92What are some of the characteristics of Alcatel-Lucent's implementation of non-stop routing? (Choose two)

A. No protocol extensions requiredB. Only supported by OSPF and IS-ISC. Transparent to routing neighborsD. Uses Graceful Restart to inter-operate with other vendors




Two neighboring OSPF routers have exchanged the packets shown. What state is the adjacency in?

A. Full; both routers are exchanging Helios to maintain the adjacency.B. The adjacency is down.C. The adjacency is in exstart state.D. The adjacency is in the exchange state.



Explanation:

QUESTION 94When an OSPF adjacency is stuck in the "ExchStart" state, what is the most likely cause?

A. The MTU does not match on both interfacesB. OSPF is not enabled on one of the routersC. The Router ID is the same on both routersD. A OSPF Hello has not been received from the neighbor



QUESTION 95Select the answer below that correctly lists the 5 different OSPF packet types.

A. Hello, Link State Update, Link State Packet, Link State Acknowledgement, Database DescriptorB. Link State Update, Link State Refresh, Link State Acknowledgement, Database Descriptor, NotificationC. Hello, Link State Refresh, Link State Update, Link State Acknowledgement, Link State AuthenticationD. Hello, Link State Update, Link State Request, Link State Acknowledgement, Database Descriptor



QUESTION 96What causes an adjacency to change from "Init" to "Two Way"?

A. When a Link State Update is received in response to a Link State RequestB. When a router receives a Hello packet from a neighbor that contains its router id in the neighbor listC. When OSPF neighbors exchange Database Descriptor packetsD. When a Link State Acknowledgement is received in response to a Link State Update


Explanation/Reference:answer is Best.

QUESTION 97When redistributing OSPF into RIP V2 what must be taken into consideration for the redistribution to takeplace?

A. The metric must be set accordingly for RIPB. The subnet mask must be removed from the OSPF routeC. You must divide the cost of the OSPF route by threeD. The router must be configured as an ASBR

Correct Answer: A



QUESTION 98What is wrong with the following filter configuration from an Alcatel-Lucent 7750 SR?

RTR-B# configure filter

RTR-B>config>filter# ip-filter 1 create

RTR-B>config>filter>ip-filter$ entry 1 create

RTR-B>config>filter>ip-filter>entry$ match src-ip 172.2.0.0/16

RTR-B>config>filter>ip-filter>entry# action drop

RTR-B# configure router interface toRTR-A

RTR-B>config>router>if# egress

RTR-B>config>router>if>egress# filter ip 1

A. There is nothing wrong with this filterB. The filter should be applied to the ingress and not the egress.C. The mask cannot be a "/" value, it must be in dotted decimal.D. All traffic is being blocked


Explanation/Reference:to the point answer.

QUESTION 99When configuring a filter, where should the most explicit entries be placed?

A. At the bottomB. In the middleC. At the topD. It does not matter where they are placed.



QUESTION 100From the list below identify two matching criteria supported for IP filters on the Alcatel-Lucent 7750SR: (Choose two)

A. DSCP markingB. Class of Service MarkingC. DSAP marking

D. ICMP type

Correct Answer: ADSection: (none)Explanation


QUESTION 101What command is used on the Alcatel-Lucent 7750 SR to define the default action to be taken if a packetdoes not match any entry in an IP filter?

A. config>filter# default-action XXXB. config>filter>ip-filter# default-action XXXC. config>filter# default-mode XXXD. config>filter>ip-filter# default-mode XXX



QUESTION 102Refer to the exhibit.

Assume that OSPFv3 is properly configured on all routers and that R4 advertises its system prefix into Area0. Which of the following statements best describes how R5 learns R4's IPv6 system prefix?

A. With a Router LSA originated by R1B. With a Router LSA originated by R5C. With a Router LSA originated by R4D. With an Inter-Area Prefix LSA originated by R1E. With an Inter-Area Prefix LSA originated by R5F. With an Inter-Area Prefix LSA originated by R4




192.168.3.1 is a loopback interface on router R2 and is distributed to OSPF area 0, but the ping fails fromrouter R3. Which of the following is a possible solution to the problem?

A. Add the "originate-default-route" option in the NSSA area configuration on router R3B. Add the "summaries" option to the NSSA area configuration on router R1C. Make a static route on router R1 to 192.168.3.1D. Make a default route on router R2



QUESTION 104Which of the statements about the output in the exhibit is FALSE?

A. The system interface is configured with IPv6 address 2001DB8 1:100:1/128B. All interfaces are configured for IPv4 and IPv6.C. Interface "toR2" is configured with a globally routed IPv6 address.D. Interface "toR3" is not configured for IPv6 with a global IPv6 address.




Given the diagram in the exhibit, what would be the correct static route configuration on the router on theright, if it is an Alcatel-Lucent 7750 SR?

A. config> static-route 0.0.0.0/0 next-hop 10.1.2.2

B. config>router> static-route 0.0.0.0 255.255.255.255 next-hop 10.1.2.1C. config>router> static-route 0.0.0.0/0 next-hop 10.1.2.2D. config>router> static-route 0 0.0 0/0 next-hop 10.1.2.1



QUESTION 106Which of the following statements regarding link state protocols are true? (Choose two)

A. When a router receives updates from its neighbors, it adds them to its link state database, performs anSPF computation, and sends the results to its neighbors.

B. An SPF computation is done by each router to determine the best path to destination networks.All the best paths determined by the SPF calculation will be seen in the route table.

C. Each router constructs its own link state database with updates received from neighbors.D. An SPF computation is done by each router to determine the best path to destination networks.

All the best paths determined by the SPF calculation will be offered to the route table manager.



QUESTION 107Which of the following OSPFv3 LSAs have an AS scope?

A. Link Local LSAB. Router LSAC. Network LSA

D. Inter-Area Router LSAE. Intra-Area Prefix LSAF. None of the above LSAs have an AS scope.

Correct Answer: FSection: (none)Explanation


QUESTION 108An operator configures an Alcatel-Lucent 7750 SR with a loopback interface and IPv6 address.

The operator then configures a routing policy to redistribute the loopback prefix into OSPFv3. What type ofLSA is used to advertise the route to other OSPFv3 routers in the same area?

A. Router LSAB. AS External LSAC. Intra-Area Prefix LSAD. Inter-Area Prefix LSAE. Network LSAF. None of the statements are correct.




Which of the following statements best describes the format of data traffic sent from the PC to the server?

A. The source IP address will be the address of the PC, and the destination IP address will be the systemIP address of router R1; the source MAC address will be the MAC address of the PC, and thedestination MAC address will be the MAC address of the router R1 port connected to the PC.

B. The source IP address will be the address of the PC, and the destination IP address will be the IPaddress of the router R1 port connected to the PC, the source MAC address will be the MAC address ofthe PC, and the destination MAC address will be the MAC address of the router R1 port connected tothe PC.

C. The source IP address will be the address of the PC, and the destination IP address will be the IPaddress of the server, the source MAC address will be the MAC address of the PC, and the destinationMAC address will be the MAC address of the server.

D. The source IP address will be the address of the PC, and the destination IP address will be the IPaddress of the server; the source MAC address will be the MAC address of the PC, and the destinationMAC address will be the MAC address of the router R1 port connected to the PC.



QUESTION 110If two routers running IS-IS protocols are exchanging Hello packets with different authentication

types, which of the following statements regarding the adjacency state established between them is true?

A. Different authentication types are not possible because IS-IS only supports password authentication.B. An adjacency will not be formedC. The two routers negotiate the authentication type and then reach the up state.D. Only an L2 adjacency will form, as long as both routers are L2 capable.



QUESTION 111Which of the following is optional when configuring IS-IS on the Alcatel-Lucent 7750 SR?

A. Configuring IS-IS interfacesB. Enabling IS-ISC. Configuring level capabilitiesD. Specifying an area address



QUESTION 112Which of the following TLV fields is included in an IS-IS Hello packet?

A. Area addresses TLVIntermediate system neighborsTLV Authentication information TLV

B. Intermediate system neighborsTLV Area addressesTLV LSP entries TLV

C. The IP internal reachability informationTLV Area AddressesTLV Authentication Information TLV

D. The IP external reachability informationTLV Area addressesTLV Intermediate system neighbors TLV



QUESTION 113What is the CIDR summary for the block of networks from 193.4532.0/24 to 193.45.47.0/24?

A. 193.45 32 0/20B. 193.45.0.0/21C. 192.45.32.0/21

D. 192.45.0.0/20



QUESTION 114The exhibit shows a route to 2001:DB8:1:200::/56 in the IPv6 route table. How did the route get into theroute table?

A. Configure router ipv6 static-route 2001:DB8:1:200::/56 next-hop FE80::225:BAFF:FE30:94E3B. Configure router ipv6 static-route 2001:DB8:1:200::/56 next-hop FE80::225:BAFF:FE30:94E3- toR2C. Configure router static-route 2001:DB8:1:200::/56 next-hop FE80::225:BAFF:FE30:94E3D. Configure router static-route 2001:DB8:1:200::/56 next-hop FE80::225:BAFF:FE30:94E3-toR2E. The route was learned through a dynamic routing protocol.


Explanation/Reference:s


A static route has been configured on router R1 to reach the PC at 139.120.121.2. However, as shown inthe exhibit, the ping fails. What is the most likely cause of the problem?

A. Router R2 does not have a route to the system address of router R1 and therefore cannot respond tothe ping.

B. There is no default route configured on the PC.C. Router R2 does not have a route configured to the PC.D. Router R1 needs to be configured with a default route.



QUESTION 116Which of the statements below best describes the operation of the IPv6 anycast address?

A. A packet with a destination anycast address is sent to all nodes on the local link.B. A packet with a destination anycast address is sent to all nodes on the local network.C. A packet with a destination anycast address is sent to all nodes that have joined the anycast group.D. A packet with a destination anycast address is sent to the nearest node that is assigned the anycast

addressE. A packet with a destination anycast address is sent to all nodes that are assigned the anycast address.



QUESTION 117Refer to the exhibit below.

R1 distributes its loopbacks into IS-IS and globally routed addresses are configured as shown. How manyroutes will R4 have in its IPv6 route table?

A. 1B. 2C. 3D. 4E. 6F. 7



QUESTION 118Which three IS-IS PDU types are used for database synchronization?

A. Hellos, CSNPs, PSNPsB. LSPs. Hellos, CSNPsC. LSPs, PSNPs, HellosD. LSPs, CSNPs, PSNPs



QUESTION 119Which of the following statements regarding IS-IS DIS is false?

A. L1 and L2 routers elect separate DIS's.B. DIS uses multicast address 0180x200:0015 to communicate with other routers on the broadcast

network.C. If a new router starts up in a LAN and has a higher interface priority, the new router preempts the

original DIS and becomes the DIS.D. In broadcast multi-access networks, such as Ethernet, a single router is elected as the DIS.

There is no backup DIS



QUESTION 120Which of the following describes the method used to resolve an IPv6 address to a MAC address?

A. IPv6 uses the Address Resolution Protocol to resolve the address to a MAC address.B. A Neighbor Discovery message is sent to the broadcast MAC address. The host with the IPv6 address

responds with a Neighbor Advertisement message.C. A Neighbor Discovery message is sent to the solicited-node multicast address. The host with the IPv6

address responds with a Neighbor Advertisement message.D. A Neighbor Discovery message is sent to the anycast address for the LAN. The host with the IPv6

address responds with a Neighbor Advertisement message.E. IPv6 addresses do not need to be resolved to a MAC address.



QUESTION 121A router sets the E bit in the flags of its Type 1 LSA. What does this indicate?

A. The router is an ABR.B. The router is an ASBR.C. The router is at the end of a virtual link.D. The router's interface is in a stub area.




Router 2 advertises the network 192.168.3.0/24 to router R1 via IS-IS.

How can router R1 ensure that it discards the route?

A. Use a prefix list on router R1 to discard all ingress IS-IS routes.B. Use an export policy and prefix list on router R1.C. Use an import policy and a prefix list on router R1.D. This is not possible because IS-IS cannot use import policies.



QUESTION 123In IS-IS database synchronization, each router compares each LSP described in the received CSNPs withthe LSPs in its own database. Which of the following actions is taken if the database contains a newer copyof the LSP?

A. The router sends a copy of the LSP from its database to its neighborB. The router sends a PSNP to its neighbor describing the LSP in its database.C. The router updates its database with the LSP and floods a copy to its other neighbors.D. The router sends a PSNP to its neighbor to request the LSP.



QUESTION 124What is the primary purpose of classless interdomain routing (CIDR)?

A. To support classful routing protocols.B. To allow IP routes to be defined using any number of bits for the network portion of the address.C. To allow interdomain routing between an IGP and EGP such as OSPF and BGP.D. To simplify the allocation of IP address space by defining a fixed size for the network portion of the

address for each of the address classes.



QUESTION 125What is the source IP address in an OSPF update?

A. 224.0.0.5B. 224.0.0.6C. The unicast IP address of the interface the update is sent onD. The system address of the router.



QUESTION 126How are LSPs acknowledged on IS-IS broadcast links?

A. The LSP is acknowledged by sending a PSNP PDU.B. The LSP is acknowledged by sending an LSP PDU.C. The LSP is acknowledged by sending a Hello PDU.D. LSP are not acknowledged on broadcast links. The DIS sends periodic CSNPs to maintain database

synchronization



QUESTION 127Which of the following are types of routers in an IS-IS topology? Choose three answers

A. Level 0B. Level 1C. Level 2D. Level 0/1E. Level 1/2




In the topology shown, router R1 is an ASBR configured to export external routes to OSPF. Assuming thatthere are no stub networks, which of the following statements regarding Type 4 LSA generation is true?

A. Router R1 generates a Type 4 LSA that is flooded to areas 0, 1, and 2.B. Router R3 generates a Type 4 LSA that is flooded to areas 0, 1, and 2.C. Router R3 generates a Type 4 LSA that is flooded to areas 0 and 2.D. Router R3 generates a Type 4 LSA that is flooded to area 0, and router R6 generates a Type 4 LSA that

is flooded to area 2.



QUESTION 129Which of the following LSA types stay within an OSPF area, and are not flooded outside of the area?Choose two answers.

A. Router LSAB. Network LSA

C Summary network LSAC. Summary router LSAD. Type 5 (AS external) LSAs

Correct Answer: ABSection: (none)Explanation


QUESTION 130Which one of the following is a valid IPv6 multicast address?

A. ff00::1:2B. fe80::216:4dff:fe13:5caeC. ::ffff:0:0.240.0.0.1D. 2001:db8::30a:216:4dff:fe13:5caeE. fd01:2234:5678::1




What is the command to configure a static route on the 7750 service router R1 to reach the network behindrouter R2?

A. configure router static-route 139.120.121.0/24 next-hop 138.120.199.2B. configure router static-route 139.120.121.0/24 next-hop 138.120.199.1C. configure router static-route 138.120.199.2/24 next-hop 138.120.199.1D. configure router static-route 139.120.121.0/24 next-hop 139.120.121.2




Router R2 advertises the network 192.168.3.0/24 to router R1 via RIP.

How can router R1 ensure that it discards the route?

A. Use an import policy and a prefix list on router R1 to reject this route.B. Use a prefix list on router R1 to discard all ingress IS-IS routes.C. Use an export policy and prefix list on router R1 to reject this route.D. This is not possible because RIP cannot use import policies.




Given the topology and the route-tables shown, which of the following is most likely to be the configurationon router R1?




QUESTION 134A router is configured with the command "configure router ecmp 4". There are two best paths to a givendestination with an equal cost in the IGP. Which of the following best describes the handling of traffic to thisdestination?

A. The router installs two routes for the destination with two different next hops. A hashing algorithm isused to distribute traffic over the two paths.

B. The router installs two routes for the destination with two different next hops. Traffic is evenly distributedover the two paths.

C. The router installs four routes for the destination with four different next hops. A hashing algorithm isused to distribute traffic over the four paths.

D. The router installs four routes for the destination with four different next hops. Traffic is evenlydistributed over the four paths.

E. The router installs one route for the destination. Traffic is evenly distributed over the two paths.



QUESTION 135Refer to the exhibit below. IS-IS IPv6 routing is configured in the network with globally routed addresses asshown. How many routes will R4 have in its IPv6 route table?

A. 1B. 2C. 3D. 4E. 6F. 7



QUESTION 136Click the exhibit button. Assuming point-to-point links, which of the following statements is true?

A. Routers R1 and R2 are L2 routers. Routers R3 and R4 are L1/L2 routersB. Routers R1, R2, and R4 are L1/L2 routers. Router R3 is an L1 router,C. Routers R1, R2, and R3 are L2 routers. Router R4 is an L1 router,D. Routers R1 and R2 are L1/L2 routers. Routers R3 and R4 are L1 routers




Assuming that the router ID of the router shown is 10.10.10.4, which of the following statements regardingthe CLI output is true?

A. The router with router ID 10.10.10.5 is an ASBR.B. The router with router ID 10.10.10.3 is an ASBR.C. The router with router ID 10.10.10.5 originated the AS summary LSA in its own area.D. The router with router ID 10.10.10.4 is in the same area as the router with router ID 10.10.10.5.



QUESTION 138Which of the following statements regarding OSPF routing updates on a point-to-point link is true?

A. On a point-to-point link, there is no need for a DR and BDR election; all routing updates are sent to224.0.0.5.

B. On a point-to-point link, a DR and BDR are elected. The DR sends link-state advertisements describingthe network.

C. On a point-to-point link, a DR and BDR are elected. To ensure resiliency, both the DR and BDR sendlink-state advertisements describing the network.

D. On a point-to-point link, there is no need for a DR and BDR election. All routing updates are sent to theunicast address of the neighbor's interface.



QUESTION 139When IS-IS is electing a DIS, what is used as the tie breaker on an Alcatel-Lucent 7750 SR, if the prioritiesare the same?

A. The system IDB. The loopback addressC. The sequence number of the Hello packetD. The device that first initiated communication becomes the DISE. The highest interface MAC address



QUESTION 140Which of the following statements are true? Choose two answers.

A. Route redistribution is only needed if Internet access is a requirement.B. Route filtering is the process of attaching data path filters to router interfaces.C. Route filtering involves deciding whether to permit or deny certain routing updates from being accepted

into, or distributed out of, the route-selection process.D. Redistribution is needed for exchanging routes from one routing protocol to another.E. OSPF routers that are redistributing routes must be configured as ABRs.



QUESTION 141Refer to the exhibit below. The routers have an established IS-IS L2 adjacency on which IPv4system addresses are exchanged. An operator successfully configures multi-topology IS-IS routing so thatthe IPv6 system addresses are also exchanged between routers. Which of the following statements bestdescribes the number of IS-IS adjacencies and the number of LSPs in the LSDB of R1 AFTER IPv6 hasbeen configured?

A. R1 has one IS-IS adjacency and one LSP.B. R1 has one IS-IS adjacency and two LSPs.C. R1 has one IS-IS adjacency and four LSPs.D. R1 has two IS-IS-adjacencies and two LSPs

E. R1 has two IS-IS adjacencies and four LSPs




If router R2 redistributes the IS-IS route to 192.168.3.0/24 into OSPF, router R3 will receive two

routes to 192.168.3.0/24. What will be the preference of these two routes? Assume that all IS-IS routers areL1/L2 capable and are in the same area. Choose two answers.

A. The OSPF internal preferenceB. The IS-IS Level 1 internal preferenceC. The IS-IS Level 2 internal preferenceD. The OSPF external preferenceE. The IS-IS Level 2 external preferenceF. The IS-IS Level 1 external preference



QUESTION 143Static routing is to be used in a network between a corporate head office with many connected networks,and a branch office with one connection to the head office. Which of the following best describes the likelyconfiguration?

A. The corporate head office router should have a default route and the branch site should have a morespecific static route

B. The corporate head office router and the branch office router should both have specific static routes.C. The corporate head office router and the branch router should both have default routes.D. The corporate head office router should have a specific static route and the branch office router should

have a default route.



QUESTION 144If routers R1 and R2 have a Level 1 and Level 2 IS-IS adjacency, which of the following statements aretrue? Choose two answers.

A. Routers R1 and R2 are in different areas,B. Routers R1 and R2 are in the same area.C. Routers R1 and R2 will send a Level 1 Hello PDU and Level 2 Hello PDU, if the interface type between


them is broadcast.E. Routers R1 and R2 will send a Level 1/2 Hello PDU, if the interface type between them is broadcast.



QUESTION 145Which of the following TLV fields is included in an IS-IS Hello packet on broadcast interfaces but not onpoint-to-point interfaces?

A. The area addresses TLVB. The intermediate system neighbors TLVC. The IP interface address TLVD. The authentication information TLV



QUESTION 146Click the exhibit button. What is the state of adjacency?

A. ExchangeB. UpC. DownD. 2-Way



QUESTION 147How can a router ID be created on an Alcatel-Lucent 7750 SR router? Choose three answers

A. From the least significant 32 bits of the chassis MAC address.B. From the most significant 32 bits of the chassis MAC address.C. From the loopback IP address.D. By using the command "config router router-id X.X.X.X"E. From the system IP address.F. From the highest interface IP address.

Correct Answer: ADESection: (none)Explanation


QUESTION 148Two IS-IS L1/L2 routers are in the same area on the same Ethernet segment. One of the routers is the DIS.How many adjacencies will be formed between them?

A. NoneB. 1C. 2D. 3E. 4



QUESTION 149An interface is configured on a router for OSPF but the command "show router ospf neighbor"does not show any neighbors. Which of the following is NOT a possible cause?

A. An OSPF database description packet has not been received from the neighbor.B. The interface facing the neighbor is down.C. The interface is included in a different area than the neighbor router.D. The router has not received a valid OSPF Hello packet from its neighbor.



QUESTION 150An interface has a MAC address of 24-16-4d-16-b5-3d. What link-local address will be assigned to thisinterface?

A. fe80::2416:4dff:fe16:b53dB. fe80::2616:4dff:fe16:b53dC. ff80::2416:4dff:fe 16:b53dD. ff80::2616:4dff:fe 16:b53dE. fd80::2416:4dff:fe16:b53d


Explanation/Reference:superb answer.


A static route is created on router R1 using the command "static-route 0.0.0.0/0 next-hop 10.3.3.2". Whatcommand can be used to test the static route on an Alcatel-Lucent 7750 SR?

A. ping static 10.5.5.5B. ping static 0.0.0.0/0C. ping 10.5.5.5D. ping 0.0.0.0




QUESTION 152Which of the following statements best describes the function of an OSPF Type 4 LSA?

A. A Type 4 LSA is originated by an ABR to describe a route to an ASBR to routers outside the area.B. A Type 4 LSA is originated by an ASBR to describe a route to itself to routers outside the area.C. A Type 4 LSA is originated by an ABR that is connected to a stub area. The LSA is injected into the

backbone area to provide routing information.D. A Type 4 LSA is originated by an ABR that is connected to a stub area. The LSA is injected into the stub

area to provide routing information.



answer is outclass.

QUESTION 153Which of the following statements concerning OSPFv3 is false?

A. MD5 Authentication is not supported.B. Router LSAs do not carry IPv6 prefix informationC. NSSA is not supported in OSPFv3.D. OSPFv3 uses a 32-bit router ID.



QUESTION 154A router receives an OSPF database description packet from a neighbor that references an LSA, which isalready in the router's LSDB. The sequence number in the DBD packet is lower than the sequence numberof the LSA in the LSDB.

What action does the router take?

A. The router sends a link-state update to its neighbor.B. The router sends a link-state acknowledgement to its neighbor.C. The router updates the information in its LSDB with the information received from its neighbor.D. The router sends a link-state request to its neighbor.E. The router takes no action.



QUESTION 155On which type of IS-IS router is summarization most likely to be configured?

A. L1 routersB. L2 routersC. L1/L2 routersD. L1 and L2 routers



QUESTION 156Which part of the NSAP address is used to indicate to the end system that a packet is to be processed bythe router itself?

A. AFIB. IDIC. HO-DSP

D. NSEL



QUESTION 157When multiple routing protocols offer a route for the same prefix, what part of the router is in charge ofdeciding which route to make active?

A. The routing information base (RIB).B. The routing table manager (RTM).C. The equal cost multipath configuration (ECMP).D. The forwarding information base (FIB).E. The link state database (LSDB).



QUESTION 158Which of the following is FALSE regarding link-state protocols?

A. Each router constructs its own link-state database with updates received from neighbors.B. When a router performs an SPF computation, it sends the results to its neighbors.C. An SPF computation is done by each router to determine the best path to destination prefixesD. The link-state database is identical for all routers in a single area routing domain.



QUESTION 159Click on the exhibit.

A static route has been configured on router R1 to reach the PC at 139.120.121.2. What might be causingthe ping to fail?

A. Router R2 needs a static route to the PC.B. Router R2 needs a default to router R1.C. Router R1 needs a default route to router R2.D. The static route should use a next-hop of 172.31.1.2



QUESTION 160A static route needs to be configured with a next-hop that is NOT directly connected to the router.Which of the following must be TRUE?

A. The router must also have an active static route to the next-hop specified in the static route command.B. The system address of the next-hop router must be included in the static route command.C. The command option "indirect" must be used in the static-route command.D. The system address of the router connected to the destination must be included in the static route

command



QUESTION 161

Click on the exhibit.

Router R1 distributes its globally routed address and its loopbacks into IS-IS. Routers R2 and R4 have theirglobally routed addresses in IS-IS.

How many routes will router R4 have in its IPv6 route table?

A. 2B. 3C. 4D. 5E. 6F. 7




All ports in the network are operationally up and have a speed of 1Gbps.

Which of the following is TRUE?

A. Data traffic from network 192.168.1.0/24 to 192.168.3.0/24 will be forwarded through router R2.B. Data traffic from network 192.168.3.0/24 to 192.168.1.0/24 will be forwarded through router R2.C. The system interface of routers R1 and R3 must be included into OSPF for traffic to flow between the

192.168.1.0/24 and 192.168.3.0/24 networks.D. The OSPF adjacency between router R1 and router R3 is operationally down.



QUESTION 163Which of the following about the OSPF BDR is TRUE?

A. A BDR is always required on point-to-point links.B. The second highest RID is always the BDR.C. The BDR only listens for link-state updates sent to 224.0.0.5.D. The BDR always acknowledges link-state updates from the DR



QUESTION 164What is the replacement for ARP in IPv6?

A. The use of Broadcast messages in combination with Neighbor Advertisement messages.B. The use of Anycast addresses in combination with Neighbor Advertisement messages.C. The use of Solicited-node multicast addresses in combination with Neighbor Advertisement messages.D. The use of Anycast addresses in combination with Link-Local Advertisement messages.




Examine the physical topology of the IS-IS network, the metrics of the links and the levels of the routers. Allrouters have a system address included in IS-IS.

Which of the following describes the route that router R4 will use to reach the system address of router R6?

A. Router R4 will have a route to router R6's system address with router R2 as the next-hop.B. Router R4 will have a default route with router R2 as the next-hop.C. Router R4 will have a default route with router R3 as the next-hop.D. Router R4 will not have a route that can be used to reach the system address of router R6.




The numbers beside the links are the metrics for that link.

Given the diagram, what path will traffic follow from router R1 to router R7, and from router R7 to router R1,if IS-IS is the routing protocol?

A. Router R1 to router R7 will follow (R1-R2-R4-R6-R7). Router R7 to R1 will follow (R7-R6-R4- R2-R1)B. Router R1 to router R7 will follow (R1-R2-R4-R6-R7). Router R7 to R1 will follow (R7-R6-R5- R3-R1)C. Router R1 to router R7 will follow (R1-R3-R5-R6-R7). Router R7 to R1 will follow (R7-R6-R4- R2-R1)D. Router R1 to router R7 will follow (R1-R3-R5-R6-R7). Router R7 to R1 will follow (R7-R6-R5- R3-R1)

Correct Answer: C




Based on the topology shown and the route tables of routers R3 and R4, which of the following is correct?

A. There is no route leaking configured on router R1 or router R2.B. Route leaking is configured on router R1 but not on router R2.C. Route leaking is configured on router R2 but not on router R1.D. Route leaking is configured on both router R1 and router R2.




The route table on router R2 shows the system address of router R5 but it does not show any of theinterfaces from the non-OSPF area.

What may be causing this?

A. 'asbr' is missing from router R1's configuration.B. Router R1 needs to have an export policy added to it.C. Router R5 does not have an export policy for these prefixes.D. Router R1 needs to have an import policy added to it.



QUESTION 169Which LSA type is not found in point-to-point only OSPF networks?

A. Type 1 Router LSAB. Type 2 Network LS AC. Type 3 Summary LSAD. Type 5 External LSA




In the topology shown, router R1 is an ASBR configured to export external routes to OSPF. There are nostub or NSSA areas. Which of the following regarding LSAs is TRUE?

A. Router R3 will advertise Type 7 LSAs to Area 0 and Area 2.B. Only routers R2 and R3 receive Type 5 LSAs advertised by router R1.C. Router R2 will receive Type 5 and Type 7 LSAs.D. Router R7 will receive Type 5 LSAs advertised by router R1.




What value would be expected in the state field?

A. ExchangeB. UpC. DownD. 2-Way



QUESTION 172Which OSPFv3 LSA advertises an ASBR?

A. AS SummaryB. Inter-Area NetworkC. Inter-Area RouterD. Intra-Area Prefix


Explanation/Reference:real answer.

QUESTION 173

Which of the following best describes the actions taken by an IS-IS router after it receives an LSP on abroadcast interface that is newer than the one in its database?

A. The router sends a copy of the LSP from its database to its neighbor.B. The router updates its database with the LSP and floods a copy to its other neighbors.C. The router updates its database with the LSP, acknowledges the LSP with a PSNP and floods a copy to

its other neighbors.D. The router updates its database with the LSP and acknowledges it with a PSNP.




Given the contents of the Router LSA, which of the following best describes the local topology of the router?

A. The router has a system interface, two point-to-point interfaces and one broadcast interface.B. The router has a system interface, two passive interfaces, two point-to-point interfaces and one

broadcast interface.C. The router has a system interface, two point-to-point interfaces and one virtual link.D. The router has a system interface, two passive interfaces, two point-to-point interfaces and one virtual

link.




Router R2 learns the networks shown from IS-IS. Router R2 is configured to redistribute routes from IS-ISto OSPF as shown. Assume the OSPF and IS-IS adjacencies are operational.

How many OSPF Type 5 LSAs will router R1 receive from router R2?

A. 0B. 1C. 2D. 3

E. 4



QUESTION 176A new router is added to a broadcast network. What is used by IS-IS as the tie breaker for selecting the DISif the priorities are the same?

A. The router with the highest system ID.B. The router with the highest loopback address.C. The Hello packet with the highest sequence number.D. The existing DIS remains the DIS.E. The router with the highest interface MAC address.



QUESTION 177What type of LSA is used to flood information about prefixes from one OSPF area to other attached areas?

A. Type 1B. Type 3C. Type 4D. Type 7




Router R5 is advertising the three loopbacks prefixes shown in OSPFv3. The following command isexecuted on router R1: R1# configure router ospf3 area 0 area-range FD00:11:11:5000:764.

Which of the following is TRUE regarding the OSPFv3 LSDB on R6?

A. Router R6 will have a single Router LSA that describes the summary prefix.B. Router R6 will have three Router LSAs - one to describe each loopback prefix.C. Router R6 will have a single Inter-Area Prefix LSA to describe the summary prefix.D. Router R6 will have three Inter-Area Prefix LSAs - one to describe each loopback prefix.E. Router R6 will not have any LSAs to describe the loopback prefix or the summarized prefix.




Given the contents of the LSPs from routers R1 and R2, which of the following is TRUE?

A. Router R1 summarizes the prefixes from router R3 as 192.168.0.0/16 and router R2 does notsummarize the prefixes.

B. Router R1 does not summarize the prefixes from routers R3 and R2 summarizes them as192.168.0.0/16.

C. Router R1 summarizes the prefixes from router R3 as 192.168.0.0/20 and router R2 does notsummarize the prefixes.

D. Router R1 does not summarize the prefixes from routers R3 and R2 summarizes them as192.168.0.0/20.

E. Both routers R1 and R2 summarize the prefixes from R3 as 192.168.0.0/20.F. Neither router R1 nor router R2 summarizes the prefixes from router R3.




What type of OSPFv3 LSA is shown?

A. Router LSAB. Network LSAC. Intra-Area Prefix LSAD. Link LSA



QUESTION 181Static routing is to be used in a network between a corporate head office with many connected networksand a branch office with one connection to the head office. Which of the following is the most likelyconfiguration on the head office and branch office routers?

A. The head office has a default route and the branch office has a specific static route.B. The head office and the branch offices both have specific static routes.C. The head office and the branch office both have default routes.D. The head office has a specific static route and the branch office has a default route



QUESTION 182Which of the following about IS-IS level hierarchies is FALSE?

A. Level 2 routers interconnect the Level 1 areas.B. There must be a contiguous Level 2 backbone to enable routing throughout the entire network.C. Level 1 routers send packets to the nearest L1/L2 router if the destination is in a different areaD. Level 2 routers store the Level 1 and Level 2 topology information in a single database.



QUESTION 183To configure 6over4 tunneling, where must indirect static routes be configured?

A. On the CEs only.B. On the PEs only.C. On only the branch office CE.D. On both the CEs and PEs.



QUESTION 184Which function or component of the Alcatel-Lucent 7750 SR is in charge of supporting dynamic routingprotocols and constructing the routing table?

A. IOMB. CPMC. FIBD. SPF




Router R4 is being added to the network and it is connected to a non-OSPF domain.

Which area type should be used for Area 1 to allow the external routes to be advertised into Area 0?

A. BackboneB. NSSAC. StubD. Totally stubby



QUESTION 186Which OSPFv3 LSA type is similar in function to the OSPFv2 Type 4 LSA?

A. LinkB. Intra-Area PrefixC. Inter-Area PrefixD. Inter-Area Router



QUESTION 187An OSPF adjacency is stuck in the exstart state. What is the most likely cause?

A. The MTU does not match on both interfaces.B. OSPF is not enabled on one of the routers.C. The router ID is the same on both routers.D. An OSPF Hello has not been received from the neighbor.E. The interfaces are configured as point-to-point on one side and broadcast on the other.



QUESTION 188Which type of OSPF LSA has the following characteristics: It is flooded only within the area it originatesfrom and can be originated by any OSPF router within the area (including non-DR routers).

A. Type 1 Router LSAB. Type 2 Network LSAC. Type 3 Summary LSAD. Type 4 ASBR LSA




Which router is the designated router for the broadcast network?

A. 10.10.10.2B. 10.10.10.3C. 10.10.10.6D. There is not enough information given to determine the designated router.




A service provider is deploying a 6 over 4 tunnel to connect a customer's corporate IPv6 network to alldevices at the branch office as shown in the exhibit.

Which command is used to create the route to the branch office network on PE1?

A. Configure router static-route 2001:DB8:1:201::/64 indirect 10.10.10.4B. Configure router static-route 2001:DB8:1:201:764 indirect 2001:DB8:1:200::2C. Configure router static-route 2001:DB8:1:200::/56 indirect 10.10.10.4D. Configure router static-route 2001:DB8:1:200:756 indirect 2001:DB8:1:200::2



QUESTION 191When a router performs the SPF calculation, which router is used as the root of the shortest path tree?

A. The router with the least number of links.B. The router with the lowest router ID.C. The router's closest neighbor.D. The router doing the calculation.



QUESTION 192A router running a link-state protocol sends an update to a neighbor. The neighbor sends an update back.

Why would the neighbor do this?

A. The neighbor's link-state database has newer information than what it received in the update.B. The neighbor sends the update as an acknowledgement.C. The neighbor's update indicates that it has run out of space in its LSDB.D. The neighbor's update indicates that the sequence number received is the same as the one already in

its link-state database.




Router R1 learns the network 192.168.3.0/24 from IS-IS. Given the OSPF configuration shown, why isn'tthe 192.168.3.0/24 route in router R3's route table?

A. The route policy should be applied as an import policy.B. The route policy should say "from protocol isis" instead of "from protocol direct".C. The ASBR configuration should be removed.D. The interface between routers R1 and R3 must be in OSPF area 0.




The operator of an IS-IS network wishes to have link metrics dynamically calculated in the same manner asOSPF. The router with system address 10.10.10.1 is one hop away on a 1 Gbps link

Which of the following is correct?

A. The router is correctly configured.B. A reference-bandwidth is not configured on the router.C. A reference-bandwidth is configured on the router but wide-metrics is not.D. The interface metric must be manually configured to 100.



QUESTION 195Which of the following concerning OSPFv3 is TRUE?

A. OSPFv3 uses MD5 Authentication.B. Router LSAs carry IPv6 prefix information.C. NSSA is supported in OSPFv3.D. OSPFv3 uses a 64-bit router ID.



QUESTION 196Which field of an IPv6 header indicates an upper layer protocol carried in the packet?

A. Next HeaderB. Traffic ClassC. Flow Label

D. Payload LengthE. Options



QUESTION 197Which of the following best describes the function of an OSPF Type 4 LSA?

A. A Type 4 LSA is originated by an ABR to describe a route to an ASBR to routers outside the area.B. A Type 4 LSA is originated by an ASBR to describe a route to itself to routers outside the area.C. A Type 4 LSA is originated by an ABR that is connected to a stub area. The LSA is injected into the

backbone area to provide routing information.D. A Type 4 LSA is originated by an ABR that is connected to a stub area. The LSA is injected into the stub

area to provide routing information.



QUESTION 198What is the primary purpose of variable length subnet masks (VLSM)?

A. To reduce the size of each routing update.B. To allow interoperability between routing protocols.C. To allow different subnet masks for different subnets.D. To reduce the size of the routing table.



QUESTION 199Which of the following correctly describes an IPV6 header compared to an IPv4 header?

A. The IPv6 header has a header checksum field, header length field and no fragmentation offset field.B. The IPv6 header has no header checksum field, no header length field and does have a fragmentation

offset field.C. The IPv6 header has a header checksum field, no header length field and no fragmentation offset field.D. The IPv6 header has no header checksum field, no header length field and no fragmentation offset field.




The OSPF adjacency between routers R1 and R3 does not come up.

Which of the following is a possible solution to the problem?

A. Stub must be configured on Area 1 of router R1, and removed from Area 1 on router R3.B. Stub must be configured on Area 1 of router R1 and Area 1 of router R3.C. Stub must be configured on Area 0 of router R1 and Area 1 of router R3.D. Area 1 of router R3 should be Area 0, in order to connect via stub to router R1.




If router R2 re-distributes the IS-IS route 192.168.3.0/24 into OSPF, router R3 will receive two routes to192.168.3.0/24. Assume that all IS-IS routers are L1/L2 capable and are in the same area.


A. Router R3 will install the OSPF route in its routing table.B. Router R3 will install the IS-IS route in its routing tableC. Router R3 will install an OSPF route and an IS-IS route in its routing table.D. There is not enough information to answer the question.




The routers have an established IS-IS L2 adjacency on which IPv4 system addresses are exchanged. Anoperator successfully configures multi-topology IS-IS routing so that the IPv6 system addresses are alsoexchanged between routers.

After IPv6 has been configured, which of the following is TRUE?

A. Router R2 has two IS-IS adjacencies and two LSPsB. Router R2 has two IS-IS adjacencies and three LSPsC. Router R2 has two IS-IS adjacencies and four LSPsD. Router R2 has three IS-IS adjacencies and three LSPsE. Router R2 has three IS-IS adjacencies and four LSPsF. Router R2 has three IS-IS adjacencies and six LSPs




Which of the following would you expect to see in router R4's OSPF database?

Explanation:

QUESTION 204Which of the following is NOT a characteristic of a floating static route?

A. The primary and backup routes are to the same destination.B. The primary and backup routes appear in the routing table.C. The backup route is configured with a higher preference value.D. The next-hop of the primary and backup routes are different.




OSPF is operational on all links in the network diagram, all routers are the same cost, and all routers areconfigured with an ECMP value of 4. Router R5 advertises the prefix 192.168.3.0/24 into OSPF.

How many entries for prefix 192.168.3.0/24 will be in router R3's routing table?

A. 0B. 1C. 2D. 3E. 4




Given the output shown, which router is the ASBR in this network?

A. 10.10.10.2B. 10.10.10.3C. 10.10.10.4D. 10.10.10.6E. There is no ASBR configured in the network.



QUESTION 207The following are statements about fields in the Hello packet that must match in order to form an OSPFadjacency. Which statement is correct?

A. The area ID does not have to match.B. The value of the E bit in the options field does not have to match.C. The value of the Hello interval does not have to match.D. The value of the network mask does not have to match.E. The area ID, the E bit value, the Hello interval and network mask must all match.



QUESTION 208Which of the following is a difference between IS-IS and OSPF?

A. IS-IS supports VLSM and CIDR.

B. IS-IS uses OSI addressing.C. IS-IS supports manual summarizationD. IS-IS uses periodic Hello messages.




The routers have an established IS-IS L2 adjacency on which IPv4 system addresses are exchanged. Anoperator successfully configures multi-topology IS-IS routing so that the IPv6 system addresses are alsoexchanged between routers.

After IPv6 has been configured, which of the following is TRUE?

A. Router R2 has two IS-IS-adjacencies and two LSPs.B. Router R2 has two IS-IS-adjacencies and four LSPs.C. Router R2 has two IS-IS-adjacencies and three LSPs.D. Router R2 has four IS-IS-adjacencies and six LSPs.




The numbers beside the links are the metrics for that link.

Given the diagram, what path will traffic follow from router R2 to router R8, and from router R8 to router R2,if IS-IS is the routing protocol?

A. Router R2 to router R8 will follow (R2-R3-R5-R7-R8). Router R8 to R2 will follow (R8-R7-R5- R3-R2)B. Router R2 to router R8 will follow (R2-R3-R4-R6-R7-R8). Router R8 to R2 will follow (R8-R7- R6-R4-

R3-R2)C. Router R2 to router R8 will follow (R2-R3-R5-R7-R8). Router R8 to R2 will follow (R8-R7-R6- R4-R3-

R2)D. Router R2 to router R8 will follow (R2-R3-R4-R6-R7-R8) Router R8 to R2 will follow (R8-R7- R5-R3-R2)



QUESTION 211Which of the following is not included in a Router LSA?

A. Operationally down interfaces in OSPFB. Fully adjacent virtual linksC. Waiting state broadcast links

D. Fully adjacent point-to-point linksE. Loopback Interfaces in OSPF




What triggers convergence of the routing protocol when the link between switch 1 and switch 2 goes down?

A. Convergence is triggered when the adjacency between routers R1 and R2 drops as a result of hellotimeouts.

B. Convergence is triggered when the physical interfaces between routers R1 and R2 go down.C. Convergence will not be triggered because switches cannot run routing protocols between them.D. Convergence is triggered when the switches notify the routers about the link-state info.E. Convergence is triggered when an LSA is sent from router R1 to router R2 to indicate that the link is

down.



QUESTION 213An Alcatel - Lucent 7750 SR receives a route from an IS-IS LSP with internal reachability, and receives thesame route from an OSPF Type 5 LSA. If all protocol preferences are default, which route will be installedin the route table?

A. The route learned from IS-IS will be installed.B. The route learned from OSPF will be installed.C. Both routes will be installed.D. There is not enough information to answer the question



QUESTION 214Which of the following is a type of authentication that is supported by OSPF on the Alcatel-Lucent 7750SR?

A. Challenge handshake authentication protocol (CHAP)B. Two factor authenticationC. MD5 authenticationD. Extensible authentication protocol (EAP)



QUESTION 215Which of the following about 6over4 is FALSE?

A. The CE routers run only IPv6.B. The PE routers must run IPv4 and IPv6.C. The P routers must run IPv4 and IPv6.D. IPv6 routes on the PE routers may have an IPv4 address as the next hop.



QUESTION 216Which OSPFv3 LSA is similar to the OSPFv2 Type 5 LSA?

A. AS ExternalB. Inter-Area PrefixC. Inter-Area RouterD. Intra-Area Prefix



QUESTION 217Which of the following best describes a unicast IPv6 address?

A. Fixed total of 128 bits, where 64 bits are used for routing and 64 bits are used as an interface identifier.B. Fixed total of 128 bits, where 32 bits are used for the global prefix, 32 bits are used for the subnet and

64 bits are used as an interface identifier.C. Variable total length, where at least 48 bits are used for the global prefix, 48 bits are used for the subnet

and 64 bits are used as an interface identifier.D. Variable total length, where at least 64 bits are used for routing and 64 bits are used as an interface

identifier

Correct Answer: ASection: (none)

Explanation


QUESTION 218Which type of OSPF LSA lists the routers attached to a broadcast network?

A. Type 1B. Type 2C. Type 3D. Type 4E. Type 5



QUESTION 219Which of the following about Type 4 LSAs is FALSE?

A. A Type 4 LSA is not generated in a single area AS.B. A Type 4 LSA is generated by the ABRs of the area that contains the ASBR.C. A Type 4 LSA advertises the external networks connected to the ASBR.D. A Type 4 LSA is not flooded in the area that contains the ASBR.




Given the output, which of the following is the most accurate statement about the network?

A. There are five broadcast links and there are no point-to-point links.B. There are five broadcast links and there are five point-to-point links.C. There are five broadcast links. It's not possible to say how many point-to-point links there are.D. It's not possible to say how many broadcast or point-to-point links there are.




Router R2 uses IS-IS to advertise the network 192.168.3.0/24 to R1. How can router R1 discard the route?

A. Use an import policy and a prefix list on router R2.B. Use an export policy and a prefix list on router R1.C. Use an import policy and a prefix list on router R1.D. Router R1 cannot discard the route because IS-IS does not support import policies.



QUESTION 222Which type of LSA packets describe external routes originated within an NSSA area, and to what type arethey converted to at the ABR?

A. They are Type 7 within the area and are not modified at the ABR.B. They are Type 5 within the area and converted to Type 3 at the ABR.C. They are Type 5 within the area and are not modified at the ABR.D. They are Type 7 within the area and converted to Type 5 at the ABR.




What is the correct command to configure a default route on the Alcatel-Lucent 7750SR R2?

A. config> static-route 0.0.0.0/0 next-hop 10.1.2.2B. config>router> static-route 0.0.0.0 255.255.255.255 next-hop 10.1.2.1C. config>router> static-route 0.0.0.0/0 next-hop 10.1.2.2D. config>router> static-route 0.0.0.0/0 next-hop 10.1.2.1



QUESTION 224Which of the following regarding the IS-IS CSNP is FALSE?

A. CSNPs are used to maintain consistency in the Link-State database.B. CSNPs are advertised before an adjacency is formed with another router.C. There are two types of CSNPs: Level 1 and Level 2.D. The CSNP lists the LSPs in the router's database



QUESTION 225Which is the OSPFv3 equivalent to the OSPFv2 Type 7 LSA?

A. Intra-Area Prefix LSAB. Router LSAC. AS External LSAD. NSSA LSA




Given the contents of the Router LSA, which of the following best describes the local topology of the router?

A. The router has a system interface, one point-to-point interface and one virtual link.B. The router has a system interface, one passive interface, one point-to-point interface and one virtual

link.C. The router has a system interface, one point-to-point interface and one broadcast interface.D. The router has a system interface, one passive interface, one point-to-point interface and one broadcast

interface.




A static route has been configured on router R1 to reach the PC at 139.120.121.2. What might be causingthe ping to fail?

A. Router R2 needs a static route to the PC.B. Router R2 needs a default to router R1.C. Router R1 needs a default route to router R2.D. The static route should use a next-hop of 172.31.1.2



QUESTION 228Which of the following is a valid IPv6 address equivalent to 2001:0da8:0000:0000:0024:0000:4ab9:0300?

A. 2001:0da8:::0024:0000:4ab9:03B. 2001:0da8::0024::4ab9:0300C. 2001:da8::24::4ab9:300D. 2001:da8::24:0:4ab9:300




OSPF is operational on all links in the network diagram, all links have the same cost and all routers areconfigured with an ECMP value of 4. Router R4 advertises the prefix 192.168.3.0/24 into OSPF.

How many entries for prefix 192.168.3.0/24 will be l n router R1's routing table?

A. 0B. 1C. 2D. 3E. 4



QUESTION 230In IS-IS, which of the following regarding an L1/L2 router is FALSE?

A. An L1/L2 router can have adjacencies with routers in different areas.B. An L1/L2 router calculates separate SPF trees for the Level 1 and Level 2 topology.C. An L1/L2 router advertises its L2 routes to other L1 routers in the same area.D. An L1/L2 router sets the ATT bit in L1 LSPs to indicate that it has routes to other areas.




192.168.3.1 is a loopback interface on router R2 and is distributed to OSPF area 0, but the ping

fails from router R3.

Which of the following is a possible solution to the problem?

A. Add the "originate-default-route" option in the NSSA area configuration on router R3.B. Add the "summaries" option to the NSSA area configuration on router R1.C. Configure a static route on router R1 to 192.168.3.1.D. Configure a default route on router R2.



QUESTION 232How does an IS-IS router acknowledge the receipt of an IS-IS LSP on a point-to-point link?

A. They are explicitly acknowledged by sending a CSNP to the sender identifying the LSP.B. They are implicitly acknowledged as a part of the link-state database synchronization and maintenance

procedures.C. They are explicitly acknowledged by sending a PSNP to the sender identifying the LSP.D. They are implicitly acknowledged by the DIS multicast of CSNPs.

Correct Answer: CSection: (none)

Explanation


QUESTION 233Which of the following is FALSE about the databases used by a link-state routing protocol in a single arearouting domain?

A. The link-state database has local topology information from all the routers.B. The adjacency database contains all the links between all the routers.C. The forwarding database contains the next hop for all known prefixes.D. The link-state database is the same for all routers.



QUESTION 234What is the primary purpose of variable length subnet masks (VLSM)?

A. To reduce the size of each routing update.B. To allow interoperability between routing protocols.C. To allow different subnet masks for different subnets.D. To reduce the size of the routing table.




Router R1 distributes its loopbacks into IS-IS and globally routed addresses are configured as shown.

How many routes will router R4 have in its IPv6 route table?

A. 1B. 2C. 3D. 4E. 6F. 7




The operator of an IS-IS network wishes to have link metrics dynamically calculated in the same manner asOSPF. The router with system address 10.10.10.1 is one hop away on a 1Gbps link


A. The router is correctly configured.B. Neither a reference-bandwidth nor wide-metrics is configured on the router.C. A reference-bandwidth is configured on the router but wide-metrics is not.D. Wide-metrics is configured on the router but a reference-bandwidth is not.



QUESTION 237

An OSPF router receives an update in which the sequence number, age, and checksum are the same asthe entry already in the topological database. What action does the router take?

A. The link-state information is not populated in the database, but is forwarded to all neighbors.B. The link-state information already in the database is overwritten and the age is reset.C. The link-state information is not populated in the database and an acknowledgement is sent.D. The link-state information is regarded as old and nothing is done.E. A link-state request is performed to increase the sequence number.



QUESTION 238An OSPF backbone area contains Type 5 LSAs. If an attached area receives only Summary LSAs from thebackbone area, what type of area is the attached area?

A. NormalB. StubC. Totally stubbyD. Totally NSSA




Two neighboring OSPF routers have exchanged the packets shown. What state is the adjacency in?

A. Down

B. InitializingC. 2-wayD. Full



QUESTION 240If the OSPF reference bandwidth is set to 1000 Gbps. what is the cost of a 1 Gbps interface?

A. 1B. 10C. 100D. 1000


Explanation/Reference:fit answer.

QUESTION 241Which component of the Alcatel-Lucent 7750 SR is in charge of performing the longest prefix match lookupon packets that arrive on the physical interfaces?

A. CPMB. MDAC. Switch FabricD. IOM



QUESTION 242Link-state PDUs include an age field. Which of the following is FALSE?

A. When link-state information reaches the maximum age on a router, the router will flood that informationto its neighbors.

B. When a router detects that any of its link-state information has reached the maximum age, it will requesta new update from the source router.

C. Aging helps ensure that links, which are no longer part of the topology, will eventually get removed fromthe LSDB.

D. The age value is updated as the information is flooded throughout the network and when it is in theLSDB.


Explanation/Reference:particular answer.

QUESTION 243In an OSPF network, which of the following is NOT a result of manual summarization on an ABR?

A. It can reduce the topological database size.B. It can reduce the size of the route table.C. It can reduce the number of Summary LSAs.D. It can reduce the number of Router LSAs.


Explanation/Reference:answer is good.


A static route has been configured on router R1 to reach the PC at 139.120.121.2. What else is required tomake the ping succeed?

A. A default route on router R2 to router R1.B. A default route on the PC to router R2.C. A static route on the PC to router R2 and a static route on router R2 to the PC.D. A default route on router R1 to router R2.




All ports in the network are operationally up and have a speed of 1Gbps. Which of the following is TRUE?

A. Data traffic from network 192.168.1.0/24 to 192.168.3.0/24 will be forwarded through router R2.B. Data traffic from network 192.168 3.0/24 to 192.168.1.0/24 will be forwarded from router R3 directly to

router R1.C. The system interface of routers R1 and R3 must be included into OSPF for traffic to flow between the

192.168.1.0/24 and 192.168.3.0/24 networks.D. The OSPF adjacency between router R1 and router R3 is operationally up.





A. Router LSAB. Network LSAC. Inter-Area Prefix LSAD. Link LSA


Explanation/Reference:most accurate answer.


OSPF is operational on all links in the network diagram, all links are the same cost, and all routers areconfigured with an ECMP value of 4. Router R4 advertises the prefix 192.168.3.0/24 into OSPF.

How many entries for prefix 192.168.3.0/24 will be in router R5's routing table?

A. 0B. 1C. 2D. 3E. 4



QUESTION 248Which of the following regarding the IS-IS PSNP is FALSE?

A. PSNPs are used on point-to-point links to acknowledge the receipt of an LSP.B. There are three types of PSNPs: Level 1, Level 2, and Level 1/2.C. A PSNP lists some of the LSPs in the router's database.D. PSNPs are used by an IS-IS router to request LSP information from a neighboring router.



QUESTION 249Which of the following is NOT a field in the IPv6 header?

A. Next HeaderB. Traffic ClassC. Hop LimitD. Fragment OffsetE. Flow Label


Explanation/Reference:answer is great.


In the topology shown, router R1 is an ASBR configured to export external routes to OSPF.

Assuming that there are no stub or NSSA networks, which of the following regarding LSAs is TRUE?

A. Only router R1 will generate Type 4 LSAs.B. Only router R3 will generate Type 4 LSAs.C. Routers R3 and R6 will generate Type 4 LSAs.D. Routers R1.R3 and R6 will generate Type 4 LSAs.








QUESTION 252Which of the following about IS-IS is FALSE?

A. IS-IS uses the concept of Level 1 and Level 2 routers to implement hierarchy.B. An IS-IS router belongs to one or more areas.C. All Level 2 routers belong to the same area.D. A Level 1 router forwards traffic to other areas through the nearest Level 1/2 router.




Examine the physical topology of the IS-IS network, the metrics of the links and the levels of the routers. Allrouters have a system address included in IS-IS.

Which of the following describes the route that router R4 will use to reach the system address of router R6?

A. Router R4 will have a route to router R6's system address with router R2 as the next-hop.B. Router R4 will have a default route with router R2 as the next-hop.C. Router R4 will have a default route with router R3 as the next-hop.D. Router R4 will not have a route to router R6's system address, nor will it have a default route.




If router R2 re-distributes the IS-IS route 192.168.3.0/24 into OSPF, router R3 will receive two routes to192.168.3.0/24 Assume that all IS-IS routers are L1/L2 capable and are in the same area.

What will be the preference of the two routes?

A. OSPF internal preference and IS-IS Level 1 internal preference.B. OSPF internal preference and IS-IS Level 1 external preference.C. OSPF external preference and IS-IS Level 1 internal preference.D. OSPF external preference and IS-IS Level 2 internal preference.E. OSPF external preference and IS-IS Level 1 external preference.



QUESTION 255What type of packet will cause an OSPF router to respond with a link-state request packet?

A. HelloB. Link-state requestC. Link-state acknowledgmentD. Link-state updateE. Database description




Assuming point-to-point links, which of the following is TRUE?

A. Routers R1 and R2 are L2 routers. Routers R3 and R4 are L1/L2 routers.B. Routers R1, R2, and R4 are L1/L2 routers Router R3 is an L1 router.C. Routers R1, R2, and R3 are L2 routers. Router R4 is an L1 router.D. Routers R1 and R2 are L1/L2 routers. Routers R3 and R4 are L1 routers.



QUESTION 257Which OSPFv3 LSA advertises the location of an ASBR?

A. Intra-Area Prefix LSAB. Inter-Area Prefix LSAC. Inter-Area Router LSAD. AS External LSA



QUESTION 258In an IS-IS network, why does the DIS create a pseudo-node?

A. It represents a group of routers on the same non-broadcast network.B. It represents the topological database of the backbone network in an IS-IS network.C. It represents a broadcast sub-network.D. It represents the complete topology of an IS-IS area.



QUESTION 259Which OSPFv3 LSA type is similar in function to the OSPFv2 Type 3 LSA?

A. LinkB. Intra-Area PrefixC. Inter-Area PrefixD. Inter-Area Router



QUESTION 260Which of the following is a feature of a black-hole static route?

A. It discards packets based on the source address.B. It discards packets that match the destination prefix.C. It returns ICMP unreachable messages.D. It discards packets based on the egress port.




Given the output shown, which router is the ASBR in this network?

A. 10.10.10.2B. 10.10.10.3C. 10.10.10.4D. 10.10.10.6E. There is no ASBR configured in the network.




Which of the following best describes the format of data traffic sent to the server as it exits from the PC?

A. The destination IP address will be the system IP address of router R1 and the destination MAC addresswill be the MAC address of the router R1 port connected to the PC.

B. The destination IP address will be the IP address of the router R1 port connected to the PC and thedestination MAC address will be the MAC address of the router R1 port connected to the PC.

C. The destination IP address will be the IP address of the server and the destination MAC address will bethe MAC address of the server.

D. The destination IP address will be the IP address of the server and the destination MAC address will bethe MAC address of the router R1 port connected to the PC.




An OSPFv3 router is attached to a non-OSPF domain that includes networks 2001:DB8:8::/64.2001.DB8:9::/64 and 2001 :DB8:A::/64. Other routers in the OSPF domain see the prefix 2001, DB8:8::/64, butnot the other two prefixes.

What could cause this?

A. The router is not configured as an asbr.B. The router is not configured as an NSSA.C. The export policy is not applied to OSPFv3.D. The prefix list should be 2001:DB8:8::/46



QUESTION 264An IS-IS router receives a CSNP that references an older LSP than the one in its database. What action istaken?

A. The router sends a copy of the LSP from its database to its neighbor.B. The router sends a PSNP to its neighbor describing the LSP in its database.C. The router updates its database with the LSP and floods a copy to its other neighbors.D. The router sends a PSNP to its neighbor to request the LSP.



QUESTION 265Two IS-IS routers are exchanging Hello packets with different authentication types. Which of the following isTRUE?

A. Different authentication types are not possible because IS-IS only supports password authentication.B. An adjacency will not be formed.C. The two routers negotiate the authentication type and then reach the up state.D. Only an L2 adjacency will form, as long as both routers are L2 capable.



QUESTION 266Which of the following route types must be manually configured and will not re-route traffic when a linkfailure occurs in its path?

A. A route from IS-IS.B. A route from OSPF.C. A floating static route.D. A static route.



QUESTION 267Why does IPv6 not use ARP?

A. The ARP functionality has been replaced by the Neighbor Discovery protocol.B. The ARP functionality is not needed due to the increased IPv6 address space.C. ICMPv6 reduced its role to connectivity checking and auto-configuration only.D. ICMFV6 replaced the ARP functionality with Multicast Listener Discovery (MLD).




Router R2 uses OSPF to advertise the network 192.168.3.0/24 to router R1. A route policy has beenconfigured to reject the route on router R1.

Why doesn't the route policy work?

A. The prefix list "reject" should be "192.168.3.0/16 exact".B. Router R1 should be configured as an OSPF "asbr".C. The policy was not "committed" after creation.D. Router R1 cannot reject the route because OSPF does not support import policies


Explanation/Reference:efficient answer.


Router R2 has a directly connected interface to network 192.168.3.0/24 that is included in IS-IS.

If router R4 redistributes the IS-IS route to 192.168.3.0/24 into OSPF, router R3 will receive two routes to192.168.3.0/24. Assume that all IS-IS routers are L1/L2 capable and are in the same

area.


A. Router R3 will install the IS-IS route in it's routing table.B. Router R3 will install the OSPF route in it's routing table.C. Router R3 will install an OSPF route and an IS-IS route in it's route table.D. There is not enough information to answer the question.



QUESTION 270Which of the following describes the purpose of 6over4 tunneling?

A. To give IPv6 traffic preferential routing over IPv4 routes.B. To allow core routers running only IPv6 protocols to carry IPv4 traffic.C. To give IPv4 only routers the ability to route based on IPv6 addresses.D. To allow IPv6 traffic to pass through an IPv4 network.

Correct Answer: D



QUESTION 271In OSPFv3, which of the following LSA types carries prefixes and is only flooded in the area where it isgenerated?

A. LinkB. AS ExternalC. RouterD. Intra-Area Prefix




192.168.3.1 is a loopback interface on router R2 and is distributed to OSPF area 0, but the ping fails fromrouter R3. Which of the following is a possible solution to the problem?

A. Add "stub no summaries" to the area 1 configuration on router R1.B. Add the "originate-default-route" option in the area 1 configuration on router R1.C. Add a default static route on router R3.D. Include the system interface in the area 1 configuration on router R3.E. Add a static route on router R3 to 192.168.3.1.



QUESTION 273What event causes an OSPF adjacency to change from 'down' to 'two way'?

A. The router receives a link-state update in response to a link-state request.B. The router receives a Hello packet from its neighbor that contains its own router ID in the neighbor list.C. The router receives a database description packet from its neighbor.D. The router receives a link-state acknowledgement in response to a link-state update




In the topology shown, router R1 is an ASBR configured to export external routes to OSPF. Assuming that

there are no stub networks, which of the following statements regarding Type 5 LSA generation is TRUE?

A. Router R1 generates a Type 5 LSA that is flooded to area 1 only.B. Router R1 generates a Type 5 LSA that is flooded to areas 1 and 0. Router R6 generates a Type 5 LSA

that is flooded to area 2.C. Router R1 generates a Type 5 LSA that is flooded to areas 0.1, and 2.D. Router R3 generates a Type 5 LSA that is flooded to areas 0 and 2E. Type 5 LSAs are not generated in this network topology.



QUESTION 275Which of the following are major features of OSPF? (Choose 2.)

A. Fast reroute capability.B. Control traffic prioritization.C. Route redistribution.D. Traffic engineering extensions.E. Cut through forwarding.



QUESTION 276An Alcatel-Lucent 7750 SR has a port with the MAC address of 00;03:FA:AC:77: AF. The port is bound toan interface. If IPv6 is then enabled on that interface .what will the link-local address be?

A. FE80::203:FAFF:FEAC:77AF/64B. 2000::203:FAFFFEAC:77AF/64C. FE80::3FAFF:FEAC:77AF/64D. FC00::203:FAFF:FEAC:77AF/64E. FC00::3:FAFF:FEAC:77AF/64



QUESTION 277

A service provider is deploying a 6over4 tunnel to connect a customer's branch office IPv6 network to thecorporate headquarters as shown in the exhibit. Which command is used to create a default route on PE2for the branch office network?

A. configure router static-route 0.0.0.0/0 indirect 10.10.10.2B. configure router static-route 0.0.0.0/0 indirect 2001:DB8:1:100::1 C. configure router static-route ::/0 indirect 10.10.10.2D. configure router static-route::/0indirect2001:DB8:1:100::1E. configure outer static-route::/0indirect2001:DB8:1:101::1



QUESTION 278Which of the following regarding IS-IS DIS is FALSE?

A. L1 and L2 routers elect separate DIS's.B. DIS uses a specific Ethernet multicast address to communicate with other routers on the broadcast

network.C. If a new router starts up in a LAN and has a higher interface priority, the new router preempts the

original DIS and becomes the DIS.D. In broadcast multi-access networks, such as Ethernet, one router is elected as the DIS and a second

router as the backup DIS.



QUESTION 279What are the three databases that are maintained by a link-state protocol?

A. Neighbor, adjacency, routing.B. Neighbor, topology, forwarding.C. Topology, routing, forwarding.D. Topology, forwarding, traffic classification.E. Neighbor, adjacency, forwarding.




OSPF router R2 has both point-to-point and broadcast interfaces and it is not a DR for any interfaces.Router R2 detects the link failure between itself and router R1.


A. Router R2 sends an update to 224.0.0.5 on its broadcast and point-to-point interfaces. The DR does notsend any updates.

B. Router R2 sends an update to 244.0.0.5 on its point-to-point interfaces. The DR sends an update to224.0.0.6 on the broadcast network.

C. Router R2 sends an update to 224.0.0.5 out its point-to-point interfaces and an update to 224.0.0.6 outits broadcast interface. The DR sends updates to 224.0.0.5 on the broadcast network.

D. Router R2 sends an update to 224.0.0.6 out its point-to-point interfaces and an update to 224.0.0.5 outits broadcast interface. The DR sends an update to 224.0.0.6 on the broadcast networks.


Explanation/Reference:answer is suitable.

QUESTION 281Which of the following best describes distance vector protocols?

A. They periodically exchange copies of routing tables between adjacent routers and do not maintain anyknowledge of links on non adjacent routers.

B. They use shortest path first algorithms, do not exchange copies of routing tables between routers anddo maintain knowledge of links on non adjacent routers.

C. They periodically exchange copies of routing tables between adjacent routers and maintain knowledgeof links on non adjacent routers.

D. They use shortest path first algorithms, exchange copies of routing tables between routers and maintainknowledge of links on non adjacent routers.


Explanation/Reference:agree with the answer.

QUESTION 282The solicited node address for the destination node address of 2001:DB8::30A:216 4DFF:FE14:6CAE is:

A. 2001::FF:FE:14:6CAE

B. 2001::1:FF:14:6CAEC. FF02.DB8::30A:216:4DFF:FE14.6CAED. FF02::1:FF14:6CAE




What does the field "2001:DB8:111::/64" represent?

A. The router's system address.B. The next-hop prefix.C. The interface's global prefix.D. The next-hop system address.


Explanation/Reference:actual answer.

QUESTION 284An Alcatel-Lucent 7750 SR is configured with an export policy to redistribute a loopback prefix into OSPFv3.

What type of LSA advertises the prefix to the other OSPFv3 routers in the same area?

A. Router LSAB. AS External LSAC. Intra-Area Prefix LSAD. Inter-Area Prefix LSAE. Network LSA

Correct Answer: B



QUESTION 285How is the DR selected when an OSPF router is added to a broadcast network?

A. The current DR is selected, if there is one. Otherwise, the router with the lowest priority is the DR. Ifpriorities are the same, the DR is chosen based on the lowest RID.

B. The current DR is selected, if there is one. Otherwise, the router with the highest priority is the DR. Ifpriorities are the same, the DR is chosen based on the highest RID.

C. The router with the lowest priority is the DR. If priorities are the same, the current DR is selected.Otherwise the DR is chosen based on the lowest RID.

D. The router with the highest priority is the DR. If priorities are the same, the current DR is selected.Otherwise the DR is chosen based on the highest RID.



QUESTION 286Which of the following best describes the features of Classless Inter-Domain Routing (CIDR)?

A. Automatic summarization and the use of IP addresses that use any number of bits for the networkportion of the address.

B. Manual summarization and the use of IP addresses that use any number of bits for the network portionof the address.

C. Automatic summarization and the use of IP addresses that use a fixed number of bits for the networkportion of the address.

D. Manual summarization and the use of IP addresses that use a fixed number of bits for the networkportion of the address.




Before the link failure, all routers have operational OSPF adjacencies between them and there is a BFDsession between routers R1 and R3.

After the link failure, which of the following affects the IGP convergence time?

A. The convergence time depends on the value of the OSPF hello timers on routers R1 andR3.B. The convergence time depends on the value of the OSPF hello timers and Dead interval on routers R1

and R3.C. The convergence time depends on the value of the BFD interval and multiplier settings on routers R1

andR3.D. The convergence time depends on the time taken by the switches to detect the link failure.




Assume that OSPFv3 is properly configured on all routers and that router R4 advertises its system prefixinto Area 0.

Which of the following best describes how router R5 learns router R4's IPv6 system prefix?

A. With a Router LSA originated by router R1.B. With a Router LSA originated by router R5.C. With a Router LSA originated by router R4.D. With an Inter-Area Prefix LSA originated by router R1.E. With an Inter-Area Prefix LSA originated by router R5.F. With an Inter-Area Prefix LSA originated by router R4.



QUESTION 289Which of the following best describes the forwarding of a IPv6 packet that has a destination anycastaddress?

A. It is sent to all nodes on the local link.B. It is sent to all nodes on the local network.

C. It is sent to all nodes that have joined the anycast group.D. It is sent to the nearest node that is assigned the anycast addressE. It is sent to all nodes that are assigned the anycast address.



QUESTION 290Which OSPFv3 LSA type is generated by an ABR to advertise prefixes from one area to another?

A. AS ExternalB. Intra-Area PrefixC. Inter-Area RouterD. Inter-Area Prefix


Explanation/Reference:sensual answer.

QUESTION 291Which of the following best describes an OSPF Type 3 LSA?

A. A Type 3 LSA is generated by an ASBR only when route summarization is configured.B. A Type 3 LSA is generated by an ABR only when route summarization is configured.C. A Type 3 LSA is generated by an ASBR to describe routes to routers outside the area.D. A Type 3 LSA is generated by an ABR to describe routes to routers outside the area.


Explanation/Reference:real answer.

QUESTION 292Which of the following is a characteristic of OSPFv2 that was NOT preserved in OSPFv3?

A. LSA flooding mechanism.B. Totally stubby areas.C. MD5 authentication.D. DR and BDR election.



QUESTION 293Which of the following statements regarding distance vectors protocols are true?

(Choose two answers).

A. RIPv1, RIPv2, and BGP are distance vector protocols.B. OSPF and IS-IS are distance vector protocols.C. Routing tables are exchanged between neighbors; however, no routing table is transmitted beyond the

immediate neighbor.D. Distance vector protocols use the Dijkstra SPF algorithm.E. Routers that participate in distance vector routing protocols maintain full knowledge of distant routers

and how they interconnect



QUESTION 294An Alcatel-Lucent 7750 SR is configured with an export policy to redistribute a loopback prefix into OSPFv3.

What type of LSA advertises the prefix to the other OSPFv3 routers in the same area?

A. Router LSAB. AS External LSAC. Intra-Area Prefix LSAD. Inter-Area Prefix LSAE. Network LSA



QUESTION 295When a router receives an IP packet, but does not find a match in the routing table for the destination IPaddress, what actions are performed by the router?

A. The packet is flooded out all router interfaces.B. The packet is dropped and an ICMP unreachable message is sent back to the source.C. The packet is silently discarded.D. The packet is flooded out all interfaces and an ICMP unreachable message is sent.


Explanation/Reference:reliable answer.

QUESTION 296If routers R1 and R2 have a Level 1 and Level 2 IS-IS adjacency, which of the following statements is true?Choose two answers.

A. Routers R1 and R2 are in different areas.B. Routers R1 and R2 are in the same area.C. Routers R1 and R2 will send a Level 1 Hello PDU and Level 2 Hello PDU, if the interface type between


them is broadcast.E. Routers R1 and R2 will send a Level 1/2 Hello PDU if the interface type between them is broadcast.









Before the link failure, all routers have operational OSPF adjacencies between them and there is a BFDsession between routers R1 and R3.

After the link failure, which of the following affects the IGP convergence time?

A. The convergence time depends on the value of the OSPF hello timers on routers R1 andR3.B. The convergence time depends on the value of the OSPF hello timers and Dead interval on routers R1

and R3.C. The convergence time depends on the value of the BFD interval and multiplier settings on routers R1

andR3.D. The convergence time depends on the time taken by the switches to detect the link failure.



QUESTION 299Which of the following commands can be used to display the number of SPF computations that have beenperformed on a router?

A. show router ospf area <area-id>B. show router ospf neighborC. show router ospf interfaceD. show router ospf status


Explanation/Reference:answer is right.



A. Convergence is triggered when the adjacency between routers R1 and R2 drops as a result of Hellotimeouts. At this point, both routers R1 and R2 re-compute their link state database and send updates totheir adjacent routers. Once the process is complete for all routers, the networks have converged.

B. Convergence is triggered when the physical interfaces between routers R1 and R2 go down. At thispoint, both routers R1 and R2 re-compute their link state database and send updates to their adjacentrouters. Once the process is complete for all routers, the networks have converged.

C. Convergence will not be triggered because switches cannot run routing protocols between them.D. Convergence is triggered when the switches notify the routers about the link state information.

At this point, both routers R1 and R2 re-compute their link state database and send updates to theiradjacent routers. Once the process is complete for all routers, the networks have converged

E. Convergence is triggered when an LSA is sent from router R1 to router R2 to indicate that the link isdown. At this point, both routers R1 and R2 re-compute their link state database and send updates totheir adjacent routers. Once the process is complete for all routers, the networks have converged.


Explanation/Reference:Excellent answer.


Which of the following would correctly configure routers R2, R3, and R4?



Explanation/Reference:rightful answer.


QUESTION 302Static routing will be used in a network between a corporate head office, with many connected networks,and a branch office, with one connection to the head office. Which of the following best describes the likelyconfiguration?

A. The corporate head office router will have a default route and the branch site will have a more specificstatic route.

B. The corporate head office router and the branch office router will both have specific static routes.C. The corporate head office router and the branch router will both have default routes.D. The corporate head office router will have a more specific static route and the branch office router will



Explanation/Reference:answer is fabulous.

QUESTION 303Which of the following are similarities between OSPF and IS-IS? Choose two answers.

A. Metric is based on hop count.B. Slow convergence after link failures.C. Support hierarchy through the use of areas.D. Support for CIDR.E. Link state updates sent using layer 3 multicast.


Explanation/Reference:answer is fit.

QUESTION 304Which of the following types of networks are supported on an Alcatel-Lucent 7750 SR for OSPF? Choosetwo answers.

A. BroadcastB. Non-broadcast multi-accessC. Point-to-pointD. Point-to-multipoint


Explanation/Reference:answer is sophisticated.


A static route is created on router R1 "using the "static-route 0.0.0.0/0 next-hop 10.3.3.2"

command. What command can be used to test the static route on an Alcatel-Lucent 7750 SR?



Explanation/Reference:perfect answer.


What is the state of adjacency?

A. InitializingB. UpC. DownD. 2-Way


Explanation/Reference:absolutely right answer.

QUESTION 307In an OSPF Hello packet, which of the following fields must match for all neighbor routers on the segment?Choose three answers.

A. Area ID W B.B. Hello and Dead intervals PC.C. Stub flagD. Checksum valuesE. The list of neighbors



answer is accurate.


In the topology shown, router R1 is an ASBR configured to export external routes to OSPF. How many type4 LSAs will be present in the network?

A. One.B. One for each of the routers in area 0C. One for each of the external routes exported by router R1.D. Type 4 LSAs are not generated in this network topology.




What is the command to configure a static route on the Alcatel-Lucent 7750 SR router R1 to reach thenetwork behind router R2?

A. configure router static-route 139.120.121.0/24 next-hop 138.120.199.2B. configure router static-route 139.120.121.0/24 next-hop 138.120.199.1

C. configure router static-route 138.120.199.2/24 next-hop 138.120.199.1D. configure router static-route 139.120.121.0/24 next-hop 139.120.121.2


Explanation/Reference:answer is efficient.

QUESTION 310Which type of OSPF LSA lists the routers attached to a broadcast network?

A. Type 1B. Type 2C. Type 3D. Type 4E. Type 5


Explanation/Reference:answer is straight.

QUESTION 311When an OSPF adjacency is stuck in the "ExchStart" state, what is the most likely cause?

A. The MTU does not match on both interfacesB. OSPF is not enabled on one of the routersC. The Router ID is the same on both routersD. A OSPF Hello has not been received from the neighbor


Explanation/Reference:correct answer.


In the topology shown, router R1 is an ASBR configured to export external routes to OSPF. Assuming thatthere are no stub networks, which of the following statements regarding Type 4 LSA generation is true?

A. Router R1 generates a Type 4 LSA that is flooded to areas 0, 1, and 2.B. Router R3 generates a Type 4 LSA that is flooded to areas 0, 1, and 2.C. Router R3 generates a Type 4 LSA that is flooded to areas 0 and 2.D. Router R3 generates a Type 4 LSA that is flooded to area 0, and router R6 generates a Type 4 LSA that




QUESTION 313When a router receives an IP packet, but does not find a match in the routing table for the destination IPaddress, what actions are performed by the router?

A. The packet is flooded out all router interfaces.B. The packet is dropped and an ICMP unreachable message is sent back to the source.C. The packet is silently discarded.D. The packet is flooded out all interfaces and an ICMP unreachable message is sent.


Explanation/Reference:answer is great.

QUESTION 314Which of the following statements regarding distance vectors protocols are true?

(Choose two answers).

A. RIPv1, RIPv2, and BGP are distance vector protocols.B. OSPF and IS-IS are distance vector protocols.C. Routing tables are exchanged between neighbors; however, no routing table is transmitted beyond the

immediate neighbor.D. Distance vector protocols use the Dijkstra SPF algorithm.E. Routers that participate in distance vector routing protocols maintain full knowledge of distant routers

and how they interconnect


Explanation/Reference:to the point answer.


Routers R1 ,, R2, and R3 are running a classful routing protocol between them. Assuming that router R1advertises all directly connected networks, how will these networks be represented in router R3's routingtable?

A. Router R3's routing table can only contain one of the routes, which will result in route flapping.

B. Router R3's routing table will have one entry for 10.1.1.0/24 and one entry for 10.1.2.0/24.C. The networks will be represented with one entry of 10.0.0.0/8 in router R3's routing table.D. The networks will be represented with one entry of 10.0.0.0/24 in router R3's route table.


Explanation/Reference:definite answer.

QUESTION 316In an IP datagram, which of the following fields identifies the receiving application?

A. The protocol field of the transport layer header.B. The port field of the transport layer header.C. The protocol field of the network layer header.D. The port field of the network layer address.


Explanation/Reference:answer is valid.

QUESTION 317Static routing will be used in a network between a corporate head office, with many connected networks,and a branch office, with one connection to the head office. Which of the following best describes the likelyconfiguration?

A. The corporate head office router will have a default route and the branch site will have a more specificstatic route.

B. The corporate head office router and the branch office router will both have specific static routes.C. The corporate head office router and the branch router will both have default routes.D. The corporate head office router will have a more specific static route and the branch office router will



Explanation/Reference:Best answer.


What is the command to configure a static route on the Alcatel-Lucent 7750 SR router R1 to reach thenetwork behind router R2?

A. configure router static-route 139.120.121.0/24 next-hop 138.120.199.2B. configure router static-route 139.120.121.0/24 next-hop 138.120.199.1C. configure router static-route 138.120.199.2/24 next-hop 138.120.199.1D. configure router static-route 139.120.121.0/24 next-hop 139.120.121.2


Explanation/Reference:answer is straight.

QUESTION 319There is an IP host with IP address 10.2.3.1. A static route is created, using the "configure router static-route 10.2.3.0/24 next-hop 10.1.2.1" command. What is the correct traceroute command to test this staticroute on an Alcatel-Lucent 7750 SR?

A. traceroute 10.2.3.1B. traceroute 10.2.3.1 next-hop 10.1.2.1C. traceroute next-hop 10.1.2.1D. traceroute does not work on the Alcatel-Lucent 7750 SR.E. traceroute 10.1.2.1


Explanation/Reference:appropriate answer.


A static route is created on router R1 "using the "static-route 0.0.0.0/0 next-hop 10.3.3.2"

command. What command can be used to test the static route on an Alcatel-Lucent 7750 SR?




QUESTION 321Which of the following statements apply to link state protocol behavior? Choose three answers.

A. Routers broadcast the entire route table to all neighbors.B. Information about directly connected links is sent to all neighbors.C. An adjacency database is maintained by each router.D. The sequence number for an update is incremented as it is flooded from router to router.E. The topological database is the same for all routers in a single area.


Explanation/Reference:answer is genuine.

QUESTION 322

Click the exhibit button.


A. Convergence is triggered when the adjacency between routers R1 and R2 drops as a result of Hellotimeouts. At this point, both routers R1 and R2 re-compute their link state database and send updates totheir adjacent routers. Once the process is complete for all routers, the networks have converged.

B. Convergence is triggered when the physical interfaces between routers R1 and R2 go down. At thispoint, both routers R1 and R2 re-compute their link state database and send updates to their adjacentrouters. Once the process is complete for all routers, the networks have converged.

C. Convergence will not be triggered because switches cannot run routing protocols between them.D. Convergence is triggered when the switches notify the routers about the link state information.

At this point, both routers R1 and R2 re-compute their link state database and send updates to theiradjacent routers. Once the process is complete for all routers, the networks have converged

E. Convergence is triggered when an LSA is sent from router R1 to router R2 to indicate that the link isdown. At this point, both routers R1 and R2 re-compute their link state database and send updates totheir adjacent routers. Once the process is complete for all routers, the networks have converged.


Explanation/Reference:explained answer.

QUESTION 323What are the default Hello and Dead timer intervals for OSPF on the Alcatel-Lucent 7750 SR?

A. 5 and 15 secondsB. 10 and 30 secondsC. 5 and 20 secondsD. 10 and 40 seconds


Explanation/Reference:exact answer.

QUESTION 324What causes an adjacency to change from down to two ways?

A. When a link state update is received in response to a link state request.B. When a router receives a Hello packet that contains its own router ID in the neighbor list from a

neighbor.C. When a router receives a database description packet from a neighbor.D. When a link state acknowledgement is received in response to a link state update.


Explanation/Reference:answer is applicable.


In the topology shown, router R1 is an ASBR configured to export external routes to OSPF. Assuming thatthere are no stub networks, which of the following statements regarding type 4 LSA generation is true?

A. Router R1 generates a type 4 LSA that is flooded to areas 0, 1, and 2.B. Router R3 generates a type 4 LSA that is flooded to areas 0, 1, and 2.C. Router R3 generates a type 4 LSA that is flooded to areas 0 and 2.D. Router R3 generates a type 4 LSA that is flooded to area 0, and router R6 generates a type 4 LSA that




QUESTION 326Which of the following commands can be used to display the number of SPF computations that have beenperformed on a router?

A. show router ospf area <area-id>B. show router ospf neighborC. show router ospf interfaceD. show router ospf status



QUESTION 327Which of the following statements describe the major features of OSPF? Choose two answers.

A. Fast reroute capabilityB. Control traffic prioritizationC. Route redistributionD. Traffic engineering extensionsE. Cut through forwarding


Explanation/Reference:answer is sophisticated.


What can you deduce from the show command on router R6?

A. The router R6 interface is in a multi-access segment. It is neither the DR nor the BDR for the segment.The DR for this segment would be the router with router ID 10.10.10.5.

B. The router R6 interface is in a multi-access segment. It is neither the DR nor the BDR for the segment;however, this command does not indicate whether 10.10.10.3 or 10.10.10.5 is the DR or BDR.

C. The router R6 interface is in a multi-access segment. It is the BDR, which is why it is not adjacent to theother routers.

D. The router R6 interface is in a multi-access segment. It is neither the DR nor the BDR for the segment.The DR for this segment would be the router with router ID 10.10.10.3.




In the topology shown, router R1 is an ASBR configured to export external routes to OSPF. How many type4 LSAs will be present in the network?

A. One.B. One for each of the routers in area 0C. One for each of the external routes exported by router R1.D. Type 4 LSAs are not generated in this network topology.


Explanation/Reference:trustful answer.

QUESTION 330Which of the following conditions will prevent an OSPF adjacency from reaching the full state? Choosethree answers.

A. MTU mismatchB. Incorrect subnet maskC. System interface not included in OSPFD. Area ID not the sameE. Different metric set on each end of the linkF. Router ID not defined

Correct Answer: ABDSection: (none)Explanation



The following command sequence is executed on router R2:

- A: R2# configure router ospf router-id 10.10.10.99- A: R2# configure router router-id 10.10.10.66

On router R1, what router ID appears for router R2 directly after these commands are executed?

A. 10.10.10.99B. 10.10.10.66C. 10.10.10.2D. 10.10.10.1



QUESTION 332What is another term to describe the default route for a client?

A. Black holeB. Default gatewayC. Gateway pathD. Proxy ARP


Explanation/Reference:answer is definite.

QUESTION 333

Which of the following is not one of the MT topologies defined for IS-IS?

A. IPv4 In-Band ManagementB. IPv6 RoutingC. IPv4 Multicast RoutingD. IPv6 Multicast RoutingE. All of the above are MT topologies defined for IS-IS.



QUESTION 334Click the exhibit button

The 192 168 3.0/24 network is learned on router R1 via IS-IS Given the OSPF configuration shown, andassuming that the OSPF adjacency between routers R1 and R3 is up, why is the 192 168.3.0/24 route notin router R3's route table? (Choose two)

A. The route policy should be applied as in import policy

B. The no-redistribute-external command is used on router R1C. The route policy is incorrect. It should say "from protocol ISIS" rather than "from protocol direct".D. It is not possible to be an ASBR and an NSSA. The ASBR configuration should be removed.E. The interface between routers R1 and R3 needs to be in OSPF area 0 rather than OSPF area 1

because a backbone area must always exist.



QUESTION 335Which of the following best describes the actions after an IS-IS router receives on a broadcast interface, anewer LSP than the one in its database?

A. The router sends a copy of the LSP from its database to its neighborB. The router updates its database with the LSP and floods a copy to its other neighbors.C. The router updates its database with the LSP, acknowledges the LSP with a PSNP and floods a copy to

its other neighbors.D. The router updates its database with the LSP and acknowledges it with a PSNP.




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