CCNA Guide to Networking - Ch11 - Quiz Solutions

CCNA Guide to Cisco Networking, Fourth Edition Chapter 11 Solutions

Chapter 11 Solutions

Review Questions1. If you want to use CHAP authentication, which protocol would you employ?a. Multilinkb. PAPc. Frame relayd. PPP relay

2. What is the default encapsulation type on serial interfaces of Cisco routers?a. PPPb. HDLCc. SDLCd. Frame relay

3. Which of the following is an NCP? (Choose all that apply.)a. IPXCPb. HDLCc. SDLCd. ATCPe. IPCP

4. PPP was derived from .a. Frame relayb. HDLCc. RBOCd. ISDN

5. What is a common reason for looping an interface?a. to achieve greater bandwidthb. to drop nonessential framesc. to increase packet sized. testing

6. Which of the following is a unique number that helps devices discover looped interfaces?a. MACb. LCPc. magic numberd. bandwidth

7. Which of the following employs the strongest encryption technique?a. plain textb. PAPc. CHAPd. clear text

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8. If you want your router to use CHAP and then PAP authentication, which of the following commands would be correct?a. router>ppp au chap papb. router#ppp authentication chap papc. router(config-if)#ppp au pap chapd. router(config-if)#ppp au chap pape. router(config)#ppp authentication chap pap

9. Which WAN protocol did PPP replace?a. HDLCb. SDLCc. SLIPd. LAPD

10. Which protocol is used to automatically build the Frame Relay map along with LMI?a. ARPb. RARPc. Inverse ARPd. DLCI

11 . To make DLCI numbers globally significant, LMI causes routers to issue ___ that advertise the DLCI numbers.a. unicastsb. keepalivesc. broadcastsd. multicasts

12. When negotiating a data transfer rate for Frame Relay with a telecommunications provider, the rate agreed upon is the .a. keepalive rateb. CIRc. EBSd. DDR

13. The Address portion of the Frame Relay frame contains which of the following pieces of information? (Choose all that apply.)a. DLCIb. FECNc. Flagd. BECNe. FCS

14. The line speed of a Frame Relay connection is known as the .a. access rateb. CBSc. EBSd. CIR

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15. ____ numbers are locally significant in Frame Relay connections and are used to identify specific virtual circuits. a. DLCIb. PDNc. ARPd. LMI

16. To prevent routing loops, Frame Relay uses .a. loopback attackb. split horizonc. event horizond. DLCI numbers

17. Frame relay is more efficient than older WAN encapsulation methods because error correction is handled by ______________ Frame Relay communications.a. lower layersb. DLCIc. LMId. upper layers

18. Frame relay uses _________ to combine multiple data streams on one connection.a. duplexingb. simplexingc. multiplexingd. encoding

19. What is the purpose of keepalive packets?a. to reduce data transfer ratesb. to keep PVCs activec. to increase data transfer ratesd. to negotiate connection speed

20. Which of the following layers do WAN specifications typically define? (Choose all that apply.)a. Physicalb. Data Linkc. Networkd. Transporte. Presentation

21. In Frame Relay, what would be considered the DCE?a. customer’s routerb. terminal adapterc. PPPd. frame relay switch

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21. Which of the following was formerly CCITT?a. ASCIIb. ANSIc. ITU-Td. EBCDIC

22. What is another term used to describe a Frame Relay switch?a. FRNDb. FRADc. PDNd. PSTN

23. Which of the following would be a subinterface for Serial 0/1?a. S0/0.1b. S0/0.2c. S0/1.2d. S0/2.1

24. What does LMI stand for?a. Logical Management Interfaceb. Local Management Interfacec. Logical Maintenance Interconnectd. Logical Maintenance Interface

25. What are the three possible connection states for a DLCI? (Choose all that apply.)a. Interactiveb. Activec. Inactived. Disconnectede. Deleted

26. Which of the following does not allow broadcasts to be sent to multiple destinations through a single interface?a. LMIb. subinterfacesc. LCPd. MBAe. NBMA

27. Which of the following is a type of virtual circuit? (Choose all that apply.)a. MVCb. PVCc. SVCd. QVC

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28. Which of the following are LMI encapsulation types supported by Cisco routers? (Choose all that apply.)a. LMI 2b. ciscoc. ansid. v923ie. q933a

29. Which of the following is the default LMI encapsulation type for a Cisco router?a. LMI 2b. ciscoc. ansid. v923ie. q933a

30. What does the router(config-if )#encap fr command do?a. sets the enable mode prompt to FRb. enables Frame Relay on the first serial interfacec. sets the encapsulation to Frame Relayd. sets the language to French

31. Which of the following commands would show statistics for a virtual circuit?a. router>sh frame mapb. router#sh frame mapc. router#sh frame pvcd. router(config-if)#sh frame pvc

32. What Frame Relay encapsulation must be configured on Cisco routers that are attached to non-Cisco routers?a. ietfb. ciscoc. ansid. q933a

33. How often are Frame Relay keepalive packets sent by default?a. every 30 secondsb. every 10 secondsc. once every hour on the half-hourd. once every hour on the houre. once every 30 minutes

Case ProjectsCase Project 1

The network administrators will have to decide what bandwidth requirements they have. They should also record the DLCI to remote IP mappings for each PVC. Other considerations include

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whether Inverse ARP will be enabled, what LMI encapsulation will be used, and whether the connections will be point-to-point or multipoint.

Case Project 2

If the network is a multipoint configuration, all IP addresses for the connections between Austin, Dallas, San Antonio, and Houston will be on the same subnet. A multipoint configuration is subject to the Split Horizon rule because the multiple PVCs are connected to a single interface or subinterface. Only one IP network number or subnet number is required. If the network is a point-to-point configuration, then all IP addresses for the connections will be on different networks or subnets. A point-to-point configuration will not be subject to the Split Horizon rule because the single serial interface is divided into multiple subinterfaces, or multiple physical interfaces are used. Point-to-point configurations do not support Inverse ARP.

Case Project 3

You can use the show int s#, show fr pvc, show fr map, and show fr lmi commands to monitor the connection. There could be problems with the lmi type, the configured bandwidth, the frame relay map, split horizon, or possibly the frame relay encapsulation type.

Case Project 4

It is possible to run HDLC and PPP on the serial interfaces of most routers. The paragraph should focus on the fact that each vendor’s implementation of HDLC is proprietary so it would not be a good choice for connectivity. The paragraph should then discuss how PPP is an open standard and would be a good choice to use for connectivity between Cisco and non-Cisco routers.

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CCNA Guide to Networking - Ch11 - Quiz Solutions