Network Convergence and Routing Protocols: A Comprehensive Guide

1. After 4.2 Last modified 11-2-10

2. All routers are using RIPv2. At what stage will this network converge, after the routers start up? • Initial network discovery • First exchange of routing information • Second exchange of routing information • Third exchange of routing information • Later than that

3. Which feature is most important when selecting a routing protocol for a large network? Convergence Time Scalability VLSM support Resource usage Administrator knowledge requirements

4. Which feature determines the duration of routing loops? Convergence Time Scalability VLSM support Resource usage Administrator knowledge requirements

5. Which of these is not a distance-vector routing protocol? OSPF EIGRP RIP IGRP More than one of the above

6. After 3.4

7. Which timer determines when an old route is removed from the routing table? Update timer Invalid timer Flush timer Holddown timer None of the above

8. Which routing protocol does not send periodic updates? • RIP • RIPv2 • EIGRP • IGRP • None of the above

9. How many of these items are used by RIP? Invalid timer Flush timer Holddown timer Triggered updates 0 1 2 3 4

10. S3 goes down. After that, R2 and R3 exchange many updates changing the metric for the route to PC3. Which term describes this problem? Count to infinity Routing loop Route poisoning Invalid timer None of the above

11. S3 goes down. Which technique will most rapidly stop all routers sending packets to S3? Count to infinity Split horizon Route poisoning Periodic updates The question cannot be answered from the data given