CCNA Guide to Cisco Networking, Fourth Edition Chapter 11 Solutions
Chapter 11 Solutions
Review Questions
1. If you want to use CHAP authentication, which protocol would you employ?
2. What is the default encapsulation type on serial interfaces of Cisco routers?
3. Which of the following is an NCP? (Choose all that apply.)
4. PPP was derived from .
a. Frame relay
5. What is a common reason for looping an interface?
6. Which of the following is a unique number that helps devices discover looped
interfaces?
7. Which of the following employs the strongest encryption technique?
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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?
9. Which WAN protocol did PPP replace?
10. Which protocol is used to automatically build the Frame Relay map along with LMI?
a. ARP
11 . To make DLCI numbers globally significant, LMI causes routers to issue ___ that
advertise the DLCI numbers.
a. unicasts
12. When negotiating a data transfer rate for Frame Relay with a
telecommunications provider, the rate agreed upon is the .
13. The Address portion of the Frame Relay frame contains which of the following
pieces of information? (Choose all that apply.)
d. CIR
15. ____ numbers are locally significant in Frame Relay connections and are used to
identify specific virtual circuits.
16. To prevent routing loops, Frame Relay uses .
a. loopback attack
17. Frame relay is more efficient than older WAN encapsulation methods because error
correction is handled by ______________ Frame Relay communications.
18. Frame relay uses _________ to combine multiple data streams on one
connection.
19. What is the purpose of keepalive packets?
20. Which of the following layers do WAN specifications typically define? (Choose all
21. In Frame Relay, what would be considered the DCE?
21. Which of the following was formerly CCITT?
22. What is another term used to describe a Frame Relay switch?
23. Which of the following would be a subinterface for Serial 0/1?
24. What does LMI stand for?
25. What are the three possible connection states for a DLCI? (Choose all that apply.)
26. Which of the following does not allow broadcasts to be sent to multiple destinations
through a single interface?
a. LMI
27. Which of the following is a type of virtual circuit? (Choose all that apply.)
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28. Which of the following are LMI encapsulation types supported by Cisco routers?
(Choose all that apply.)
29. Which of the following is the default LMI encapsulation type for a Cisco router?
30. What does the router(config-if )#encap fr command do?
31. Which of the following commands would show statistics for a virtual circuit?
32. What Frame Relay encapsulation must be configured on Cisco routers that are
attached to non-Cisco routers?
33. How often are Frame Relay keepalive packets sent by default?
a. every 30 seconds
Case Projects
Case 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
CCNA Guide to Cisco Networking, Fourth Edition Chapter 11 Solutions
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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
Case Project 3
Case Project 4
It is possible to run HDLC and PPP on the serial interfaces of most routers. The paragraph