The following questions test your understanding of the topics covered in this chapter. After you have answered the questions, check your answers in Appendix A. If you get an answer wrong, review the answer and ensure that you understand the reason for your mistake. If you are confused by the answer, refer to the appropriate text in the chapter to review the concepts.
Which system generates the pseudonode?
What is a CSNP? When is it used?
What is a PSNP? When is it used?
A new router comes online on a multiaccess link, and the priority is the same as that of the DIS for the segment. What action is taken?
What happens in the event of the DIS dying?
Integrated IS-IS can be used to send information about which routed protocols?
How often does the DIS send out a Hello packet?
What is the name of the link-state algorithm used to create entries for the routing table?
What is the relationship between the Hello timer and when the path is considered to have died?
Integrated IS-IS areas are similar to which type of areas in OSPF?
Describe one design restriction in configuring Level 2 routing.
Given the following address:
Is this a NET or NSAP address? Give reasons for your choice.
What is a pseudonode and what is its purpose?
State two reasons why a router might not be able to find a neighbor.
Explain briefly why two routers cannot have the same system ID within the area.
What does TLV stand for? Briefly explain its purpose.
How many link-state databases does a Level 1-2 router have?
Integrated IS-IS packets run directly on top of which layer?
What is the NET address associated with in the IS-IS addressing scheme?
Describe briefly the main characteristics of a Level 1 IS.