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1) What is required to implement VLSM? In order to implement VLSM, a network admin must use a routing protocol that supports it. Cisco routers support VLSM with Open Shortest Path First (OSPF), Integrated IS-IS, Enhanced Interior Gateway Routing Protocol (EIGRP), RIP v2, and static routing.
2) What command is required to use subnet zero? You must use the “ip subnet zero” command.
3) VLSM should always be used on what types of links? Point-to-Point links between routers.
4) What does CIDR mean and how is it implemented? CIDR mean “Classless Interdomain Routing”
5) Why is route aggregation important? Networks close to one another save routing table space. Every network needs a separate entry in the routing table. Each subnet needs separate entry in the routing table. Route aggregation can reduce the size of the routing table.
6) Why is RIPv1 considered a classful IGP? Because RIPv1 uses the first octet to determine address class and the network ID. Classless IGP uses CIDR value to determine the network ID.
7) What are two enhancements/improvements of RIPv2 over RIPv1? Transmits the subnet mask with route update to enable VLSM support. RIPv2 provides authentication for enhanced security. RIPv2 includes a next-hop route IP address in its routing update. Uses external route tags. Provides multicast routing upd
8) What command is used to implement RIPv2? Use the following command: Router(config-router)# version 2
9) What command can be used to confirm RIPv2 has been enabled? Use the following command: Router# show ip protocols
10) What command can be used to observe routing updates Use the debug ip rip command to display RIP routing updates as they are sent and received. The no debug all or undebug all commands will turn off all debugging.
Created by: mpulse