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56.
Which command will display the CHAP authentication process as it occurs between two
routers in the network?
- A.show chap authentication
- C.debug ppp authentication
- B.show interface serial 0
- D.debug chap authentication
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| The command debug ppp authentication will show you the authentication process that PPP uses between point-to-point connections. |
57.
Which command is required for connectivity in a Frame Relay network if Inverse ARP is not operational?
- A.frame-relay arp
- C.frame-relay interface-dci
- B.frame-relay map
- D.frame-relay lmi-type
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| If you have a router in your Frame Relay network that does not support IARP, you must create Frame Relay maps on your router, which provide known DLCI-to-IP address mappings. |
58.
Suppose that you have a customer who has a central HQ and six branch offices. They anticipate
adding six more branches in the near future. They wish to implement a WAN technology
that will allow the branches to economically connect to HQ and you have no free ports on the
HQ router. Which of the following would you recommend?
- A.PPP
- C.Frame Relay
- B.HDLC
- D.ISDN
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| The key is "there are no free ports" on your router. Only Frame Relay can provide a connection to multiple locations with one interface, and in an economical manner no less. |
59.
Which of the following command options are displayed when you use the Router#show
frame-relay ? command? (Choose three.)
- A.dlci
- C.lmi
- E.map
- B.neighbors
- D.pvc
- Answer & Explanation
- Report
Answer : [C, D, E]
Explanation :
Explanation :
| The show frame-relay ? command provides many options, but the options available in this question are lmi, pvc, and map. |
60.
How should a router that is being used in a Frame Relay network be configured to keep split
horizon issues from preventing routing updates?
- A.Configure a separate subinterface for each PVC with a unique DLCI and subnet assigned to the subinterface.
- B.Configure each Frame Relay circuit as a point-to-point line to support multicast and broadcast traffic.
- C.Configure many subinterfaces in the same subnet.
- D.Configure a single subinterface to establish multiple PVC connections to multiple remote router interfaces.
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| If you have a serial port configured with multiple DLCIs connected to multiple remote sites, split horizon rules (discussed in Chapter 5) stop route updates received on an interface from being sent out the same interface. By creating subinterfaces for each PVC, you can avoid the split horizon issues when using Frame Relay. |
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