APRIL 6, 2011 100% Take Assessment - EWAN Final Exam - CCNA Exploration: Accessing the WAN (Version 4.0) 1 Which IEEE 802.16 broadband wireless technology allows users to connect to the ISP at speeds comparable to DSL and cable? Wi-Fi satellite WiMAX Metro Ethernet 2 A technician is talking to a colleague at a rival company and comparing DSL transfer rates between the two companies. Both companies are in the same city, use the same service provider, and have the same rate/service plan. What is the explanation for why company 1 reports higher download speeds than company 2 reports? Company 1 only uses microfilters at branch locations. Company 1 has a lower volume of POTS traffic than company 2 has. Company 2 is located farther from the service provider than company 1 is. Company 2 shares the connection to the DSLAM with more clients than company 1 shares with. 3 Refer to the exhibit. What would be the result of entering the exhibited configuration on a Frame Relay router?

The local interface DLCI will be set to 102. All traffic that is destined to 172.16.16.8 will be sent as broadcast. Only broadcast traffic will be recieved on the Frame Relay interface. Routing protocol multicast updates can be forwarded across the Frame Relay PVC. 4 An administrator is unable to receive e-mail. While troubleshooting the problem, the administrator is able to ping the local mail server IP address successfully from a remote network and can successfully resolve the mail server name to an IP address via the use of the nslookup command. At what OSI layer is the problem most likely to be found? physical layer data link layer network layer application layer 5 What will be the result of adding the command ip dhcp excluded-address 192.168.24.1 192.168.24.5 to the configuration of a local router that has been configured as a DHCP server? Traffic that is destined for 192.168.24.1 and 192.168.24.5 will be dropped by the router. Traffic will not be routed from clients with addresses between 192.168.24.1 and 192.168.24.5.

The DHCP server will not issue the addresses ranging from 192.168.24.1 to 192.168.24.5. The router will ignore all traffic that comes from the DHCP servers with addresses 192.168.24.1 and 192.168.24.5. 6 Which two statements are true about creating and applying access lists? (Choose two.) There is an implicit deny at the end of all access lists. One access list per port, per protocol, per direction is permitted. Access list entries should filter in the order from general to specific. The term "inbound" refers to traffic that enters the network from the router interface where the ACL is applied. Standard ACLs should be applied closest to the source while extended ACLs should be applied closest to the destination. 7 Which statement about a VPN is true? VPN link establishment and maintenance is provided by LCP. DLCI addresses are used to identify each end of the VPN tunnel. VPNs use virtual Layer 3 connections that are routed through the Internet. Only IP packets can be encapsulated by a VPN for tunneling through the Internet. 8 What is an accurate description of CHAP when used with PPP on a serial connection between two routers? A username and password are sent to the peer router, which replies with an accept or reject message. A username and password are sent to the peer router. If these match the configuration in the peer, the peer in turn provides a username and password to the initiating router. A challenge message is sent to the peer router, which responds with its username and a calculated value based on a shared secret. This value is then compared by the challenger to its own calculations. An encrypted password is sent to the peer router, which decrypts it and compares it to a shared secret. If the decrypted passwords match, the peer sends the encrypted password back to the initiating router. 9 A technician has been asked to run Cisco SDM one-step lockdown on the router of a customer. What will be the result of this process? Traffic is only forwarded from SDM-trusted Cisco routers. Security testing is performed and the results are saved as a text file stored in NVRAM. The router is tested for potential security problems and any necessary changes are made. All traffic entering the router is quarantined and checked for viruses before being forwarded.

10 Refer to the exhibit. Results of the show vlan and show vtp status commands for switches S1 and S2 are displayed in the exhibit. VLAN 11 was created on S1. Why is VLAN 11 missing from S2? There is a Layer 2 loop. The VTP domain names do not match. Only one switch can be in server mode. S2 has a higher spanning-tree priority for VLAN 11 than S1 does. 11 Which section of a security policy is used to specify that only authorized individuals should have access to enterprise data? statement of scope statement of authority Internet access policy acceptable use policy campus access policy identification and authentication policy 12 What are two major characteristics of a worm? (Choose two.) exploits known vulnerabilities attaches itself to another program executed by a predefined time or event masquerades as an accepted program copies itself to the host and selects new targets

13 What can a network administrator do to recover from a lost router password? use the copy tftp: flash: command boot the router to bootROM mode and enter the b command to load the IOS manually telnet from another router and issue the show running-config command to view the password boot the router to ROM monitor mode and configure the router to ignore the startup configuration when it initializes 14 Which type of ACL will permit traffic inbound into a private network only if an outbound session has already been established Between the source and destination? extended reflexive standard time-based 15 An administrator is configuring a dual stack router with IPv6 and IPv4 using RIPng. The administrator receives an error message when trying to enter the IPv4 routes into RIPng. What is the cause of the problem? When IPv4 and IPv6 are configured on the same interface, all IPv4 addresses are over-written in favor of the newer technology. Incorrect IPv4 addresses are entered on the router interfaces. RIPng is incompatible with dual-stack technology. IPv4 is incompatible with RIPng. 16 Which variable is permitted or denied by a standard access control list? protocol type source IP address source MAC address destination IP address destination MAC address

17 Refer to the exhibit. A network administrator is attempting to configure a Frame Relay network. The administrator enters the commands as shown in the exhibit on R2, but the Frame Relay PVCs are inactive. What is the problem? The incorrect DLCI numbers are being configured on R2. The S0/0/0 interface on R2 needs to be point-to-point. The frame-relay map commands are missing the cisco keyword at the end. A single router interface cannot connect to more than one Frame Relay peer at a time. 18 Which two functions are provided by the Local Management Interface (LMI) that is used in Frame Relay networks? (Choose two.) simple flow control error notification congestion notification mapping of DLCIs to network addresses exchange of information about the status of virtual circuits

19 Refer to the exhibit. A network administrator has been asked to configure PPP with CHAP authentication over the serial link between routers R1 and R2. What additional configuration should be included on both routers to complete the task? 20 A company is deciding which WAN connection type it should implement between its main office and branch offices. The company wants to use a cost-effective service that provides virtual circuits between each office. The company also wants to be able to transmit variable length packets on these circuits. Which solution best meets these requirements? ATM HDLC ISDN Frame Relay 21 When configuring a Frame Relay connection, what is the purpose of Inverse ARP? to assign a DLCI to a remote peer to disable peer requests from determining local Layer 3 addresses to negotiate LMI encapsulations between local and remote Frame Relay peers to create a mapping of DLCI to Layer 3 addresses that belong to remote peers

22 Refer to the exhibit. EIGRP has been configured on routers R1 and R2. Connectivity across the Frame Relay switch between routers R1 and R2 is successfully verified using the ping command. However, no EIGRP routes are appearing in the routing table. What could be a cause for this failure? The Frame Relay switch has failed. The frame-relay map statement is incorrect. The S0/0/0 interface of router R1 is administratively down. The S0/0/0 interface of router R2 has an incorrect IP address. 23

Refer to the exhibit. All devices are configured as shown in the exhibit. PC1 is unable to ping the default gateway. What is the cause of the problem? The default gateway is in the wrong subnet. STP has blocked the port that PC1 is connected to. Port Fa0/2 on S2 is assigned to the wrong VLAN. S2 has the wrong IP address assigned to the VLAN30 interface.

24 Refer to the exhibit. Which statement correctly describes how Router1 processes an FTP request that enters interface s0/0/0 and is destined for an FTP server at IP address 192.168.1.5? The router matches the incoming packet to the statement that was created by the access-list 201 deny icmp 192.168.1.0 0.0.0.255 any command, continues comparing the packet to the remaining statements in ACL 201 to ensure that no subsequent statements allow FTP, and then the router drops the packet. The router reaches the end of ACL 101 without matching a condition and drops the packet because there is no statement that was created by the access-list 101 permit ip any any command. The router matches the incoming packet to the statement that was created by the access-list 101 permit ip any 192.168.1.0 0.0.0.255 command and allows the packet into the router. It matches the incoming packet to the statement that was created by the access-list 201 permit ip any any command and allows the packet into the router. 25 What course of action will ensure data confidentiality? Protect data from eavesdropping. Guarantee that no alterations are made to the data. Ensure that only authorized users may save the data. Prevent unauthorized users from logging into the data network.

26 Refer to the exhibit. A network administrator is creating a prototype to verify the new WAN design. However, the communication between the two routers cannot be established. Based on the output of the commands, what can be done to solve the problem? Replace the serial cable . Replace the WIC on RA. Configure RA with a clock rate command. Issue a no shutdown interface command on RB. 27

Refer to the exhibit. ACL 120 is configured to allow traffic coming from 192.168.10.0/24 network to go to any destination limited to ports 80 and 443. ACL 130 should allow only requested HTTP traffic to flow back into the network. What additional configuration is needed in order for the access lists to fulfill the requirements?

28 Why is serial communication preferred over parallel communication for long distance WAN links? Serial cables contain a single wire, resulting in faster transmission speeds. Serial cables can take advantage of clock skew to increase the rate of transmission. Parallel cables are more susceptible to crosstalk, resulting in more retransmissions. Parallel cables send a single bit at a time making them slower than serial cables. 29

Refer to the exhibit. A network administrator is considering updating the IOS on Router1. What version of IOS is currently installed on Router1? 1 12.4 15 1841 30 A network administrator is instructing a technician on best practices for applying ACLs. Which two suggestions should the administrator provide? (Choose two.) Named ACLs are less efficient than numbered ACLs. Standard ACLs should be applied inside the core layer.

Place standard ACLs as close to the destination as possible. ACLs applied to outbound interfaces require fewer router resources. Extended ACLs should be applied closest to the source that is specified by the ACL. 31 An administrator learns of an e-mail that has been received by a number of users in the company. This e-mail appears to come from the office of the administrator. The e-mail asks the users to confirm their account and password information. Which type of security threat does this e-mail represent? cracking phishing phreaking spamming 32 Refer to the exhibit. From the output of the show interface commands, at which OSI layer is a fault indicated? application transport network data link physical 33 An issue of response time has recently arisen on an application server. The new release of a software package has also been installed on the server. The configuration of the network has changed recently. To identify the problem, individuals from both teams responsible for the recent changes begin to investigate the source of the problem. Which statement applies to this situation? Scheduling will be easy if the network and software teams work independently. It will be difficult to isolate the problem if two teams are implementing changes independently. Results from changes will be easier to reconcile and document if each team works in isolation. Only results from the software package should be tested as the network is designed to accommodate the proposed software platform. 34 Which security solution has the responsibility of monitoring suspicious processes that are running on a host and that might indicate infection of Trojan horse applications? antivirus application operating system patches intrusion prevention system

Cisco Adaptive Security Appliance

35 Refer to the exhibit. R1 is performing NAT overload for the 10.1.1.0/24 inside network. Host A has sent a packet to the web server. What is the source IP address of the return packet from the web server when received at the NIC on host A? 10.1.1.2:1234 172.30.20.1:1234 172.30.20.1:3333 192.168.1.2:80 36 Which statement is true about wildcard masks? Inverting the subnet mask will always create the wildcard mask. The wildcard mask performs the same function as a subnet mask. A network or subnet bit is identified by a "1" in the wildcard mask. IP address bits that must be checked are identified by a "0" in the wildcard mask.

37 Refer to the exhibit. Which statement about the configuration is true? 10.10.10.1 is most likely assigned to the local LAN interface. 10.10.10.1 through 10.10.10.255 is available to be assigned to users. All DHCP clients looking for an IP address will use 10.10.10.1 and 10.10.10.2. All DHCP clients in the 10.10.10.0/24 network will use 10.10.10.2 as the default gateway.

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Refer to the exhibit. Which VLAN will carry untagged traffic on FastEthernet 0/1? VLAN 1 VLAN 2 VLAN 11 VLAN 12 VLAN 30 VLAN 999 39

Refer to the exhibit. What is placed in the address field in the header of a frame that will travel from the DC router to the Orlando router? DLCI 123 DLCI 321 10.10.10.25 10.10.10.26 MAC address of the Orlando router 40 What name is given to the location where a customer network interfaces with a network that is owned by another organization? CPE DCE local loop demarcation point

41 Which combination of authentication and Layer 2 protocol should be used to establish a link between a Cisco and a non-Cisco router without sending authentication information in plain text? CHAP and HDLC CHAP and PPP PAP and HDLC PAP and PPP 42 Which Frame Relay flow control mechanism is used to signal routers that they should reduce the flow rate of frames? DE BE CIR FECN CBIR

43 Refer to the exhibit. Users who are connected to R1 report that they are unable to establish connectivity to the users who are connected to router R2. A network administrator tests the link with the debug ppp authentication command. Based on the output shown, which statement correctly defines the problem on the link? R1 uses PAP as a method of authentication, and R2 uses CHAP. R1 uses CHAP as a method of authentication, and R2 uses PAP. R1 uses an incorrect user name or password for CHAP authentication. R2 uses an incorrect user name or password for PAP authentication.

44 Refer to the exhibit. A network administrator is trying to backup the IOS software on R1 to the TFTP server. He receives the error message that is shown in the exhibit, and cannot ping the TFTP server from R1. What action can help to isolate this problem? Check that R1 has a route to the 10.10.10.0 network. Verify that the TFTP server software supports binary file transfers. Make sure that the TFTP server has 192.168.1.1 as its default gateway. Ensure that the laptop has an IP address in the 192.168.1.0/24 network. 45 Which WAN connection type uses a fixed-length 53 byte cell for transmitting ATM X.25 ISDN Frame Relay 46 Which wildcard mask would specify all IP addresses from 192.168.8.0 through 192.168.15.255? 0.0.0.7 0.0.7.255 0.0.8.255 0.0.15.255 0.0.255.255 47 Which statement is true of DSL? It is typically deployed in a mesh topology. The network is shared using a logical bus topology. Bandwidth is dependent on the number of concurrent users. Transfer rates are dependent on the length of the local loop. 48 Which three guidelines would help contribute to creating a strong password policy? (Choose three.) Once a good password is created, do not change it. Deliberately misspell words when creating passwords. Create passwords that are at least 8 characters in length. Use combinations of upper case, lower case, and special characters. Write passwords in locations that can be easily retrieved to avoid being locked out. Use long words found in the dictionary to make passwords that are easy to remember.

49 Which additional functionality is available on an interface when the encapsulation is changed from HDLC to PPP? flow control error control authentication synchronous communication

50 Refer to the exhibit. RIPv2 has been configured on all routers in the network. Routers R1 and R3 have not received any RIP routing updates. What will fix the issue? Enable RIP authentication on R2. Issue the ip directed-broadcast command on R2. Change the subnet masks to 10.11.12.0/8 and 172.16.40.0/16 on R2. Enable CDP on R2 so that the other routers will receive routing updates . 51 What are three attributes of a security policy? (Choose three.) It provides step-by-step procedures to harden routers and other network devices. It defines acceptable and unacceptable use of network resources. It focuses primarily on attacks from outside of the organization. It defines a process for managing security violations. It should not need to be altered once implemented. It creates a basis for legal action if necessary. 52 A network administrator has moved the company intranet web server from a switch port to a dedicated router interface. How can the administrator determine how this change has affected performance and availability on the company intranet? Conduct a performance test and compare with the baseline that was established previously. Determine performance on the intranet by monitoring load times of company web pages from remote sites. Interview departmental administrative assistants and determine if they think load time for web pages has improved. Compare the hit counts on the company web server for the current week to the values that were recorded in previous weeks.