alcatel-lucent.prepaway.4a0-101.v2018-06-24.by.christopher · 6/24/2018 · 4a0-101.exam.190q...

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4A0-101.exam.190q

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4A0-101

Alcatel-Lucent Interior Routing Protocols and High Availability

Sections1. Volume A2. Volume B3. Volume C4. Volume D5. Volume E


Exam A

QUESTION 1When 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.

Correct Answer: BSection: Volume AExplanation

Explanation/Reference:

QUESTION 2Which 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.

Correct Answer: CSection: Volume AExplanation



QUESTION 3Which 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.

Correct Answer: DSection: Volume AExplanation


QUESTION 4Which of the following OSPF area types are supported by the Alcatel- Lucent 7750 SR? Choose two answers.

A. Not so stubby areas

B. Level1 area WC

C. Stub areas

D. Partially stubby areas

E. Level 2 areas

Correct Answer: ACSection: Volume AExplanation


QUESTION 5If OSPF is used in a multi-area OSPF network, which of the following statements regarding route summarization 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-backboneareas.

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.



QUESTION 6Click the exhibit button.

The OSPF packets shown have been exchanged between two neighbors. What state is the OSPF adjacency 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 7Which of the following best describes the type of packets used by OSPF routers to exchange updates on a point-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.

Correct Answer: ASection: Volume AExplanation


QUESTION 8Which 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 is configured.

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

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.

Correct Answer: D


Section: Volume AExplanation


QUESTION 9Which of the following types of networks are supported on an Alcatel-Lucent 7750 SR for OSPF? Choose two answers.

A. Broadcast

B. Non-broadcast multi-access

C. Point-to-point

D. Point-to-multipoint



QUESTION 10If 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: Volume AExplanation


QUESTION 11Which of the following is an optional parameter when configuring IS-IS protocol on a router?


A. Configure IS-IS interfaces

B. Enable IS-IS

C. Configure level capabilities

D. Specify an area address



QUESTION 12Which 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: Volume AExplanation


QUESTION 13Which 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.

Correct Answer: B


Section: Volume AExplanation


QUESTION 14Which 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 and 20.20.2.0/24 as 20.20.0.0/16. Which router's routing table willbe reduced compared to the routing table before the summarization?

A. Router R1

B. Router R2

C. Routers R1 and R2

D. Router R4




QUESTION 16What value should the AFI be set to for locally administered addressing?

A. 1

B. 49

C. 47

D. 45

E. 39





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 18Which 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: Volume AExplanation


QUESTION 19Which 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 20Which of the following types of network topologies are supported by IS-IS on the Alcatel-Lucent 7750 SR? Choose two answers.

A. Non-broadcast

B. Broadcast

C. Point-to-multipoint

D. Point-to-point





What is the state of adjacency?

A. Initializing

B. Up

C. Down

D. 2-Way

Correct Answer: CSection: Volume A


Explanation


QUESTION 22At 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 to router R6, if IS-IS is the routing protocol? The numbersbeside 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 24When 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 DIS

E. The highest interface MAC address.

Correct Answer: ESection: Volume AExplanation


QUESTION 25Two IS-IS L1/L2 routers are in the same area on the same Ethernet segment. How many adjacencies will be formed between them?

A. None

B. 1

C. 2

D. 3

E. 4



QUESTION 26In 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 27How 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 28Given the NSAP address of 49.0012.1234.1234.1234.00, what area does the IS-IS router reside in?

A. 49.0012.1234

B. 49.0012

C. 12.1234

D. 1234

E. 49.1234




QUESTION 29Which type of IS-IS router is summarization most likely to be configured on?

A. L1 routers

B. L2 routers

C. L1/L2 routers

D. L1 and L2 routers





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 notworking. 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.

Correct Answer: ESection: Volume AExplanation



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

A. The OSPF internal preference

B. The IS-IS Level 1 internal preference

C. The IS-IS Level 2 internal preference


D. The OSPF external preference

E. The IS-IS Level 2 external preference

F. The IS-IS Level 1 external preference



QUESTION 32An 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 protocolpreferences are default, which route will be installed in the 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.

Correct Answer: ASection: Volume AExplanation


QUESTION 33Which of the following cannot be used as a matching criterion in route policy statements?

A. Source IP address

B. TCP source port


C. Prefix list

D. Protocol type



QUESTION 34How many databases does a Link State routing protocol use?

A. One

B. Two

C. Three

D. Four

Correct Answer: CSection: Volume BExplanation


QUESTION 35In an IP datagram, which field 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

Correct Answer: BSection: Volume BExplanation



QUESTION 36A static route is created using the command "static-route 0.0.0.0/0 next-hop 3.3.3.1". What command could be used to test the static route on an Alcatel-Lucent7750 SR?

A. Ping static 3.3.3.1

B. Ping static 0.0.0.0/0

C. Ping 3.3.3.1

D. Ping 0.0.0.0



QUESTION 37A static route is created using the command "static-route 2.3.4.0/24 next-hop 1.2.3.4". What is the correct traceroute command to test this static route on an Alcatel-Lucent 7750 SR?

A. traceroute 2.3.4.1

B. traceroute 2.3.4.0/24 next-hop 1.2.3.4

C. traceroute next-hop 1.2.3.4

D. traceroute does not work on the Alcatel-Lucent 7750 SR

Correct Answer: ASection: Volume BExplanation


QUESTION 38Which one of the commands below will create a static route to network 2.3.4.0/24 on the AlcatelLucent 7750 SR router?

A. Static route 2.3.4.0 255.255.255.0 next hop 3.4.5.6

B. Static-route next-hop 3.4.5.6 2.3.4.0/24

C. Static route 2.3.4.0/24 next hop 3.4.5.6


D. Static-route 2.3.4.0/24 next-hop 3.4.5.6

Correct Answer: DSection: Volume BExplanation


QUESTION 39A default route for a client is also known as the:

A. Default path

B. Default gateway

C. Gateway path

D. Proxy ARP



QUESTION 40What is the default preference value for a static route in the Alcatel-Lucent 7750 SR router?

A. 0

B. 5

C. 10

D. 15




QUESTION 41What command could be used to verify proper configuration of a static route in an Alcatel-Lucent 7750 SR router?

A. Show route-table

B. Show router routing-table

C. Show router route-table

D. Show static



QUESTION 42What address is used when RIPv2 uses multicast to send its updates?

A. 224.0.0.5

B. 224.0.0.6

C. 224.0.0.9

D. 224.0.0.10

E. RIPv2 does not have support for multicast



QUESTION 43What is the metric and maximum routable value for RIP?



A. Hop count and 16

B. Hop count and 15

C. Link cost and 15

D. Link cost and 16



QUESTION 44What 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 45Which of the following is NOT a characteristic of RIPv1?:

A. 30 second network updates

B. Classless routing

C. Broadcast advertisement

D. Poison Reverse

Correct Answer: B


Section: Volume BExplanation


QUESTION 46What 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 47Identify 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.

Correct Answer: ACSection: Volume BExplanation


QUESTION 48Choose the Distance Vector Protocols from the list below:


A. OSPF

B. RIPv1

C. RIPv2

D. IS-IS

Correct Answer: BCSection: Volume BExplanation


QUESTION 49What 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 advertised

B. Access-lists denoting what is to be advertised

C. Default metrics for each link

D. A group and neighbor statement for each peer



QUESTION 50In an OSPF environment, what must a router receive after it sends out an update?

A. The router must receive an acknowledgment

B. The router must receive a Hello

C. The router must receive a new sequence number

D. The router must receive a Link State Packet




QUESTION 51An OSPF router receives an update in which the sequence number, age, and checksum are the same as the entry already in the topological database. What actionis taken by the router?

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.



QUESTION 52From 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-IS

B. The age for newly created link state information is set to 1200 for OSPF and 0 for IS-IS

C. 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 53What are the three databases maintained by a Link State Protocol?

A. Neighbor, adjacency, route table


B. Neighbor, topology, forwarding

C. Topology, routing, forwarding

D. There are only two databases: adjacency and topology



QUESTION 54Which 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; this node 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 pseudonode

D. The DIS creates a logical node to represent the complete topology of an IS-IS area; this node is the pseudode



QUESTION 55What command will show the IS-IS neighbors, and their status on an Alcatel-Lucent 7750 SR?

A. Show isis neighbors

B. Show router isis neighbors

C. Show router isis adjacency

D. Show isis adjacency




QUESTION 56What are the types of routers in an IS-IS topology? Choose all that apply.

A. Level 0

B. Level 1

C. Level 2

D. Level 0/1

E. Level 1/2

Correct Answer: BCESection: Volume BExplanation


QUESTION 57What command allows analysis of the Dijkstra calculation on the Alcatel-Lucent 7750 SR?


A. There is no such calculation in IS-IS

B. Show router isis database

C. Show router isis dijykstra

D. Show router isis spf




QUESTION 58What is the term used for the updates sent by IS-IS?

A. Link State PDUs

B. Link State Updates

C. Link State Advertisements

D. Intermediate System Update Packets



QUESTION 59What is the value of the protocol discriminator used to denote IS-IS protocol information?

A. 89

B. 87

C. 85

D. 83



QUESTION 60What types of routers can an IS-IS L1 router form adjacencies with? Pick all that apply.

A. L1 routers in the same area

B. L1 routers in other areas

C. L2 routers in the same area

D. L2 routers in other areas


E. L1/L2 router in the same area

F. L1/L2 routers in other areas

Correct Answer: AESection: Volume BExplanation


QUESTION 61What value should the AFI be set to for locally administered addressing?

A. 1

B. 49

C. 83

D. 0



QUESTION 62What are the similarities between OSPF and IS-IS? Choose two.

A. Metric is cost based

B. Slow convergence

C. Automatic summarization

D. Support CIDR

Correct Answer: ADSection: Volume BExplanation



QUESTION 63Exhibit

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

A. An L1 adjacency will be formed.

B. An L1/L2 adjacency will formed

C. L2 adjacency will be formed

D. No adjacency will be formed

Correct Answer: DSection: Volume B


Explanation


QUESTION 64Which 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 65What acts as the tie breaker on an Alcatel-Lucent 7750 SR if the priorities are the same when IS-IS is electing a DIS?

A. The system ID

B. The loopback address

C. The sequence number of the hello packet




QUESTION 66How many bytes make up the system ID in an IS-IS NSAP address on the Alcatel-Lucent 7750 SR?

A. 4 bytes


B. 6 bytes

C. 8 bytes

D. Variably between 4 and 8 bytes



QUESTION 67In an OSPF Hello packet what fields must match all neighbor routers on the segment? (Choose 3)

A. Area ID

B. Hello and Dead Intervals

C. Stub flag

D. DR and BDR addresses

E. The list of neighbors

Correct Answer: ABCSection: Volume BExplanation


QUESTION 68What type of OSPF router generates a type 2 LSA?

A. Area Border Router

B. Autonomous System Boundary Router

C. Designated Router

D. All routers within an OSPF area.




QUESTION 69What is the default priority value used for electing the DR on an Alcatel-Lucent 7750 SR running OSPF on an Ethernet?

A. Priority of 0

B. Priority of 1

C. Priority of 64

D. Priority of 255



QUESTION 70Which of the following statements regarding the election of the designated router (DR) by OSPF routers are true? (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.

Correct Answer: BDSection: Volume BExplanation



QUESTION 71What are the types of networks supported on an Alcatel-Lucent 7750 SR for OSPF? (Choose 2)

A. Broadcast

B. Non-Broadcast Multi-Access

C. Point-to-Point

D. Point-to-Multipoint



QUESTION 72NSSA 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 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



QUESTION 73What best describes the type of packets used by OSPF routers to exchange updates on a pointto-point link?

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 74Graceful Restart is supported by what IGPs?

A. RIPv1 and RIPv2

B. OSPF

C. IS-IS

D. BGP

Correct Answer: BCSection: Volume BExplanation


QUESTION 75What are some of the characteristics of Alcatel-Lucent's implementation of non-stop routing? (Choose two)

A. No protocol extensions required

B. Only supported by OSPF and IS-IS

C. Transparent to routing neighbors

D. Uses Graceful Restart to inter-operate with other vendors



QUESTION 76


Click the exhibit button.

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.



QUESTION 77When an OSPF adjacency is stuck in the "ExchStart" 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. A OSPF Hello has not been received from the neighbor



QUESTION 78Select the answer below that correctly lists the 5 different OSPF packet types.

A. Hello, Link State Update, Link State Packet, Link State Acknowledgement, Database Descriptor

B. Link State Update, Link State Refresh, Link State Acknowledgement, Database Descriptor, 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 Descriptor




QUESTION 79What causes an adjacency to change from "Init" to "Two Way"?

A. When a Link State Update is received in response to a Link State Request

B. When a router receives a Hello packet from a neighbor that contains its router id in the neighbor list

C. When OSPF neighbors exchange Database Descriptor packets

D. When a Link State Acknowledgement is received in response to a Link State Update



QUESTION 80When redistributing OSPF into RIP V2 what must be taken into consideration for the redistribution to take place?


A. The metric must be set accordingly for RIP

B. The subnet mask must be removed from the OSPF route

C. You must divide the cost of the OSPF route by three

D. The router must be configured as an ASBR



QUESTION 81What 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 filter

B. 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



QUESTION 82When configuring a filter, where should the most explicit entries be placed?

A. At the bottom

B. In the middle

C. At the top

D. It does not matter where they are placed.



QUESTION 83From the list below identify two matching criteria supported for IP filters on the Alcatel-Lucent 7750 SR: (Choose two)


A. DSCP marking

B. Class of Service Marking

C. DSAP marking

D. ICMP type

Correct Answer: ADSection: Volume BExplanation


QUESTION 84What command is used on the Alcatel-Lucent 7750 SR to define the default action to be taken if a packet does not match any entry in an IP filter?

A. config>filter# default-action XXX

B. config>filter>ip-filter# default-action XXX

C. config>filter# default-mode XXX

D. config>filter>ip-filter# default-mode XXX



QUESTION 85What is another term to describe the default route for a client?

A. Black hole

B. Default gateway

C. Gateway path

D. Proxy ARP

Correct Answer: BSection: Volume CExplanation



QUESTION 86Which of the following is not one of the MT topologies defined for IS-IS?

A. IPv4 In-Band Management

B. IPv6 Routing

C. IPv4 Multicast Routing

D. IPv6 Multicast Routing

E. All of the above are MT topologies defined for IS-IS.

Correct Answer: ESection: Volume CExplanation


QUESTION 87Click the exhibit button


The 192 168 3.0/24 network is learned on router R1 via IS-IS Given the OSPF configuration shown, and assuming that the OSPF adjacency between routers R1and R3 is up, why is the 192 168.3.0/24 route not in 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 R1

C. 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.

Correct Answer: BCSection: Volume CExplanation


QUESTION 88Which of the following best describes the actions after an IS-IS router receives on a broadcast interface, a newer LSP 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.



QUESTION 89Refer to the exhibit.


Assume that OSPFv3 is properly configured on all routers and that R4 advertises its system prefix into Area 0. Which of the following statements best describeshow R5 learns R4's IPv6 system prefix?

A. With a Router LSA originated by R1

B. With a Router LSA originated by R5

C. With a Router LSA originated by R4

D. With an Inter-Area Prefix LSA originated by R1

E. With an Inter-Area Prefix LSA originated by R5

F. With an Inter-Area Prefix LSA originated by R4


Correct Answer: DSection: Volume CExplanation


QUESTION 90Which 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 address

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



QUESTION 91Refer to the exhibit below.


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

A. 1

B. 2

C. 3

D. 4

E. 6

F. 7

Correct Answer: CSection: Volume CExplanation


QUESTION 92Which three IS-IS PDU types are used for database synchronization?

A. Hellos, CSNPs, PSNPs

B. LSPs. Hellos, CSNPs

C. LSPs, PSNPs, Hellos


D. LSPs, CSNPs, PSNPs



QUESTION 93Which 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 94Which 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 Advertisementmessage.

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 95A 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 97In IS-IS database synchronization, each router compares each LSP described in the received CSNPs with the LSPs in its own database. Which of the followingactions is taken if the database contains a newer copy of the LSP?

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.

Correct Answer: ASection: Volume CExplanation


QUESTION 98What 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 99What is the source IP address in an OSPF update?

A. 224.0.0.5

B. 224.0.0.6

C. The unicast IP address of the interface the update is sent on

D. The system address of the router.



QUESTION 100How 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 101Which of the following are types of routers in an IS-IS topology? Choose three answers

A. Level 0

B. Level 1

C. Level 2


D. Level 0/1

E. Level 1/2

Correct Answer: BCESection: Volume CExplanation




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 followingstatements 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 103Which of the following LSA types stay within an OSPF area, and are not flooded outside of the area? Choose two answers.

A. Router LSA

B. Network LSA

C. Summary network LSA

D. Summary router LSA

E. Type 5 (AS external) LSAs

Correct Answer: ABSection: Volume CExplanation


QUESTION 104Which one of the following is a valid IPv6 multicast address?

A. ff00::1:2

B. fe80::216:4dff:fe13:5cae

C. ::ffff:0:0.240.0.0.1

D. 2001:db8::30a:216:4dff:fe13:5cae


E. fd01:2234:5678::1




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

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

B. 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 138.120.199.1

D. 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 configuration on router R1?


A. Option A

B. Option B

C. Option C

D. Option D



QUESTION 108A router is configured with the command "configure router ecmp 4". There are two best paths to a given destination with an equal cost in the IGP. Which of thefollowing best describes the handling of traffic to this destination?


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

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

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

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

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



QUESTION 109Refer to the exhibit below. IS-IS IPv6 routing is configured in the network with globally routed addresses as shown. How many routes will R4 have in its IPv6 route


table?

A. 1

B. 2

C. 3

D. 4

E. 6

F. 7



QUESTION 110Click 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 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





Assuming that the router ID of the router shown is 10.10.10.4, which of the following statements regarding the 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 112Which 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 to 224.0.0.5.

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

C. On a point-to-point link, a DR and BDR are elected. To ensure resiliency, both the DR and BDR send link-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 the unicast address of the neighbor's interface.



QUESTION 113When IS-IS is electing 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


E. The highest interface MAC address

Correct Answer: ESection: Volume CExplanation


QUESTION 114Which 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.

Correct Answer: CDSection: Volume CExplanation


QUESTION 115Refer to the exhibit below. The routers have an established IS-IS L2 adjacency on which IPv4 system addresses are exchanged. An operator successfullyconfigures multi-topology IS-IS routing so that the IPv6 system addresses are also exchanged between routers. Which of the following statements best describesthe number of IS-IS adjacencies and the number of LSPs in the LSDB of R1 AFTER IPv6 has been 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

Correct Answer: B


Section: Volume CExplanation



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 tworoutes? Assume that all IS-IS routers are L1/L2 capable and are in the same area. Choose two answers.

A. The OSPF internal preference

B. The IS-IS Level 1 internal preference

C. The IS-IS Level 2 internal preference

D. The OSPF external preference

E. The IS-IS Level 2 external preference

F. The IS-IS Level 1 external preference

Correct Answer: BDSection: Volume CExplanation



QUESTION 117Static 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 likely configuration?

A. The corporate head office router should have a default route and the branch site should have a more specific 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 118If routers R1 and R2 have a Level 1 and Level 2 IS-IS adjacency, which of the following statements are 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: Volume CExplanation


QUESTION 119Which of the following TLV fields is included in an IS-IS Hello packet on broadcast interfaces but not on point-to-point interfaces?

A. The area addresses TLV


B. The intermediate system neighbors TLV

C. The IP interface address TLV

D. The authentication information TLV



QUESTION 120Click the exhibit button. What is the state of adjacency?


A. Exchange

B. Up

C. Down

D. 2-Way




QUESTION 121How 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: Volume CExplanation


QUESTION 122Two 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. None

B. 1

C. 2

D. 3

E. 4



QUESTION 123An 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 apossible 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 124An interface has a MAC address of 24-16-4d-16-b5-3d. What link-local address will be assigned to this interface?

A. fe80::2416:4dff:fe16:b53d

B. fe80::2616:4dff:fe16:b53d

C. ff80::2416:4dff:fe 16:b53d

D. ff80::2616:4dff:fe 16:b53d

E. fd80::2416:4dff:fe16:b53d





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

A. ping static 10.5.5.5

B. ping static 0.0.0.0/0

C. ping 10.5.5.5

D. ping 0.0.0.0



QUESTION 126Which 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.



QUESTION 127Which of the following statements concerning OSPFv3 is false?

A. MD5 Authentication is not supported.

B. Router LSAs do not carry IPv6 prefix information

C. NSSA is not supported in OSPFv3.

D. OSPFv3 uses a 32-bit router ID.



QUESTION 128A router receives an OSPF database description packet from a neighbor that references an LSA, which is already in the router's LSDB. The sequence number inthe DBD packet is lower than the sequence number of 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 129On which type of IS-IS router is summarization most likely to be configured?

A. L1 routers

B. L2 routers

C. L1/L2 routers

D. L1 and L2 routers



QUESTION 130Which part of the NSAP address is used to indicate to the end system that a packet is to be processed by the router itself?

A. AFI

B. IDI

C. HO-DSP

D. NSEL

Correct Answer: D


Section: Volume CExplanation


QUESTION 131When multiple routing protocols offer a route for the same prefix, what part of the router is in charge of deciding 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 132Which 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 prefixes

D. The link-state database is identical for all routers in a single area routing domain.

Correct Answer: BSection: Volume DExplanation


QUESTION 133Click on the exhibit.


A static route has been configured on router R1 to reach the PC at 139.120.121.2. What might be causing the 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

Correct Answer: DSection: Volume DExplanation



QUESTION 134A 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

Correct Answer: CSection: Volume DExplanation




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

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

A. 2

B. 3

C. 4

D. 5

E. 6

F. 7

Correct Answer: ESection: Volume DExplanation



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 137Which 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 138What 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.

Correct Answer: C


Section: Volume DExplanation



Examine the physical topology of the IS-IS network, the metrics of the links and the levels of the routers. All routers 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: CSection: Volume D


Explanation




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 the interfaces 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 143Which LSA type is not found in point-to-point only OSPF networks?

A. Type 1 Router LSA

B. Type 2 Network LS A

C. Type 3 Summary LSA

D. Type 5 External LSA





In the topology shown, router R1 is an ASBR configured to export external routes to OSPF. There are no stub or NSSA areas. Which of the following regardingLSAs 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. Exchange

B. Up

C. Down

D. 2-Way



QUESTION 146Which OSPFv3 LSA advertises an ASBR?

A. AS Summary

B. Inter-Area Network

C. Inter-Area Router

D. Intra-Area Prefix



QUESTION 147Which of the following best describes the actions taken by an IS-IS router after it receives an LSP on a broadcast interface that is newer than the one in itsdatabase?

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.


Correct Answer: ASection: Volume DExplanation




Router R2 learns the networks shown from IS-IS. Router R2 is configured to redistribute routes from IS-IS to 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. 0

B. 1

C. 2

D. 3

E. 4



QUESTION 150A new router is added to a broadcast network. What is used by IS-IS as the tie breaker for selecting the DIS if 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 151What type of LSA is used to flood information about prefixes from one OSPF area to other attached areas?

A. Type 1

B. Type 3


C. Type 4

D. Type 7





Router R5 is advertising the three loopbacks prefixes shown in OSPFv3. The following command is executed 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 not summarize the prefixes.

B. Router R1 does not summarize the prefixes from routers R3 and R2 summarizes them as 192.168.0.0/16.

C. Router R1 summarizes the prefixes from router R3 as 192.168.0.0/20 and router R2 does not summarize the prefixes.

D. Router R1 does not summarize the prefixes from routers R3 and R2 summarizes them as 192.168.0.0/20.


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 LSA

B. Network LSA

C. Intra-Area Prefix LSA

D. Link LSA

Correct Answer: A




QUESTION 155Static 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 is the most likely configuration 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 156Which 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 area

D. Level 2 routers store the Level 1 and Level 2 topology information in a single database.



QUESTION 157To 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 158Which function or component of the Alcatel-Lucent 7750 SR is in charge of supporting dynamic routing protocols and constructing the routing table?

A. IOM

B. CPM

C. FIB

D. 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. Backbone

B. NSSA

C. Stub

D. Totally stubby



QUESTION 160Which OSPFv3 LSA type is similar in function to the OSPFv2 Type 4 LSA?

A. Link

B. Intra-Area Prefix

C. Inter-Area Prefix

D. Inter-Area Router




QUESTION 161An 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 162Which type of OSPF LSA has the following characteristics: It is flooded only within the area it originates from and can be originated by any OSPF router within thearea (including non-DR routers).

A. Type 1 Router LSA

B. Type 2 Network LSA

C. Type 3 Summary LSA

D. Type 4 ASBR LSA





Which router is the designated router for the broadcast network?

A. 10.10.10.2

B. 10.10.10.3

C. 10.10.10.6

D. 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 all devices 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 10.10.10.4

B. Configure router static-route 2001:DB8:1:201:764 indirect 2001:DB8:1:200::2

C. Configure router static-route 2001:DB8:1:200::/56 indirect 10.10.10.4

D. Configure router static-route 2001:DB8:1:200:756 indirect 2001:DB8:1:200::2



QUESTION 165When 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 166A 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't the 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 as OSPF. The router with system address 10.10.10.1 isone hop away on a 1 Gbps linkWhich 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 169Which 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 170Which field of an IPv6 header indicates an upper layer protocol carried in the packet?

A. Next Header

B. Traffic Class

C. Flow Label

D. Payload Length

E. Options



QUESTION 171Which 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 172What 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 173Which 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 to 192.168.3.0/24. Assume that all IS-IS routers are L1/L2capable and are in the same area.

Which of the following is TRUE?

A. Router R3 will install the OSPF route in its routing table.

B. Router R3 will install the IS-IS route in its routing table

C. 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. An operator successfully configures multi-topology IS-ISrouting so that the IPv6 system addresses are also exchanged 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 three LSPs


C. Router R2 has two IS-IS adjacencies and four LSPs

D. Router R2 has three IS-IS adjacencies and three LSPs

E. Router R2 has three IS-IS adjacencies and four LSPs

F. 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?


A. Option A

B. Option B

C. Option C

D. Option D



QUESTION 178Which 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 are configured with an ECMP value of 4. Router R5 advertisesthe 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. 0

B. 1

C. 2

D. 3

E. 4

Correct Answer: CSection: Volume D


Explanation



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

A. 10.10.10.2

B. 10.10.10.3

C. 10.10.10.4

D. 10.10.10.6

E. There is no ASBR configured in the network.




QUESTION 181The following are statements about fields in the Hello packet that must match in order to form an OSPF adjacency. 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 182Which 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 summarization

D. IS-IS uses periodic Hello messages.





The routers have an established IS-IS L2 adjacency on which IPv4 system addresses are exchanged. An operator successfully configures multi-topology IS-ISrouting so that the IPv6 system addresses are also exchanged 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)

Correct Answer: ASection: Volume D


Explanation


QUESTION 185Which of the following is not included in a Router LSA?

A. Operationally down interfaces in OSPF

B. Fully adjacent virtual links

C. Waiting state broadcast links

D. Fully adjacent point-to-point links

E. 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 hello timeouts.

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 187An Alcatel - Lucent 7750 SR receives a route from an IS-IS LSP with internal reachability, and receives the same route from an OSPF Type 5 LSA. If all protocolpreferences are default, which route will be installed in 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 188Which of the following is a type of authentication that is supported by OSPF on the Alcatel-Lucent 7750 SR?

A. Challenge handshake authentication protocol (CHAP)

B. Two factor authentication

C. MD5 authentication

D. Extensible authentication protocol (EAP)

Correct Answer: C




QUESTION 189Which 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 190Which OSPFv3 LSA is similar to the OSPFv2 Type 5 LSA?

A. AS External

B. Inter-Area Prefix

C. Inter-Area Router

D. Intra-Area Prefix



alcatel-lucent.prepaway.4a0-101.v2018-06-24.by.christopher · 6/24/2018 · 4a0-101.exam.190q...

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