Chapter Review Questions

You can find the answers to the following questions in Appendix A, "Answers to Chapter Review Questions."

1:	What layers of the OSI model does Frame Relay cover?
2:	What is the name of the field in the Frame Relay header that identifies a PVC? Give the acronym and what the acronym stands for.
3:	Imagine that a company has a router, router A, at its headquarters. The router will use point-to-point WAN links to send and receive traffic to and from five remote sites. How many 4-wire cables need to be run from router A to the telco CO near router A?
4:	Imagine that a company has a router, router A, at its headquarters. The router will use Frame Relay to send and receive traffic to and from five remote sites. How many 4-wire cables need to be run from router A to the telco CO?
5:	What term is used to describe the cable from a router to the CO when the router uses Frame Relay?
6:	Define the term "PVC."
7:	Does the access rate or the CIR define how many bits per second the telco commits to pass over a single PVC?
8:	Does the access rate or the CIR define the clock rate of the physical link between a router and the local CO?
9:	What does the acronym CIR stand for?
10:	Define the meaning of the term "DLCI."
11:	Explain why the term "virtual circuit" is used to describe how Frame Relay sends data to and from a pair of routers.
12:	Explain the need for IP ARP on Frame Relay PVCs.