题库精选:CCNA考试自测题第2卷

　　17) What is RIP (什么是R I P )？

　　A. RIP is an older distance vector Interior Gateway Protocol with a 30-second update timer　and . maximum of 15 hops (where “i n f i n i t y” is 16 hops)
　　
　　B. RIP is a new link-state protocol created by Cisco

　　C. RIP is a proprietary protocol created by Cisco that has two versions; only version 2 is used currently
　　
　　D. RIP is a distance vector Interior Gateway Protocol with a 224 maximum network diameter (maximum 224 hops)

　　18) What is IGRP (什么是I G R P )？

　　A. IGRP is an older distance vector Interior Gateway Protocol with a 30-second update timer and a maximum of 15 hops (where infinity is 16 hops)

　　B. IGRP is a new link-state protocol created by Cisco

　　C. IGRP is a proprietary protocol created by Cisco that has two versions; only version 2 isused currently

　　D. IGRP is a distance vector and Interior Gateway Protocol with a 224 maximum network diameter (maximum 224 hops)

　　19) What is the purpose of a flash update in IGRP (IGRP中的瞬时更新的目的是什么)？

　　A. A flash update is a standard 90-second update

　　B. After three flash updates, a route is considered unreachable

　　C. A flash update is sent immediately upon a change in the network topology, in order to speed convergence

　　D. After seven flash updates, a route is removed from the routing table

　　20) How can the administrator change how IGRP selects routes (管理员如何修改I G R P选择路由的方法)？

　　A. The administrator can set update timers

　　B. The administrator can enable or disable split horizon

　　C. The administrator can set up load balancing across redundant routes

　　D. The administrator can adjust the metric weights used for determining the route selection

　　21) The way to get traffic from one segment of the network to another segment is (在网段之间进行通信的方法是)：

　　A. Bridging

　　B. Routing

　　C. Switching

　　D. All of the above

　　22) Routing occurs at which layer (路由发生在哪一层)？

　　A. Physical layer

　　B. Data link layer

　　C. Network layer

　　D. Transport layer

　　23) In general, the bets route selected by a router is one with (一般而言，路由器选择的最佳路由具有何种特性)？

　　A. Least cost

　　B. Shortest distance

　　C. Lowest metric value

　　D. None of the above

　　24) A routing table typically includes which of the following (路由表通常包含下列的哪些信息)？

　　A. Destination network address

　　B. The total number of networks

　　C. The number of nodes in each network

　　D. The total number of routers in a network