The questions and scenarios in this book are designed to be challenging and to make sure that you know the answer. Rather than allowing you to derive the answers from clues hidden inside the questions themselves, the questions challenge your understanding and recall of the subject.

You can find the answers to these questions in Appendix A. For more practice with exam-like question formats, use the exam engine on the CD-ROM.

1.List the OSPF area types.
2.Which area types permit LSA type 1 and 2?
3.Which area types permit LSA type 3 and 4?
4.Which area type permits type 5?
5.What is OSPF LSA type 7?
6.What is the problem with multiple ABRs in a totally stubby area?
7.List advantages with totally stubby areas.
8.Which area types permit a virtual link?
9.Why must internal routers in a stub area be identified as stub?
10.What is the difference between null, plaintext, and MD5 authentication?
11.What is a message digest?
12.How do ASBR routes appear in the routing table inside an NSSA?