Appendix A. Answers to the “Do I Know This Already?” Quizzes
Chapter 1
1. B. The area ID, authentication, hello/dead intervals, stub flag, and maximum transmission unit (MTU) size must match to form OSPF adjacencies.
2. B, C. The router with the highest OSPF priority will be elected as the DR. If there is a tie, the router with the higher ID will be elected as the DR.
3. B, C. When multiple OSPF routers are connected to a multi-access medium such as Ethernet or nonbroadcast multiple access (NBMA), a designated router (DR), and a backup designated router (BDR) are elected. DRs reduce network traffic because only they maintain the complete OSPF database and then send updates to the other routers on the shared network segment.
4. B, D. The OSPF ...
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