| 下面的问题将帮助你评价在本章中学习到的内容。仔细阅读所有的选项，因为正确答案可能多于1个。选择每个问题中所有的正确答案。
6) When a node on one network sends a packet to a node on another segment that is three hops away, what addresses are included in the initial addressing of that packet (select 2) (当网络上的节点向另一个跳3个跳上的节点发送信息表时，在那个信息表的初始地址中包含了什么地址)？ A. The network address of the router B. The MAC layer address of the router C. The network address of the destination node D. The MAC layer address of the destination node 7) What are three objectives for a routing protocol (路由选择协议的3个目标是什么)？ A. Accuracy B. Quick holddowns C. Rapid Convergence D. Low overhead 8) Define convergence (定义收敛)。 A. Convergence is the updates that are triggered by network changes B. Convergence is the process of sending 呼叫packets C. Convergence is two routers merging their routing tables into one D. Convergence is the synchronizing of all routing tables on the internetwork, or simply the synchronization of a single route change across all routers. 9) Why are dynamic routing protocols considered dynamic (为什么动态路由选择协议考虑动态)？ A. Because each route is dynamically selected for each packet with a destination network not attached to the router。 B. Because new routes are dynamically recomputed whenever there is a change in the nternetwork topology C. Because convergence happens faster D. Because all the routes remain the same no matter what changes happen on the network 10) What is a static route (什么是静态路由)？ A. A static route is one that has been manually entered into the routing table and is not updated by a routing protocol B. A static route is one that is recomputed whenever a change is made on the internetwork C. A static route is one that is redistributed when it has been learned by another routing protocol D. A static route is one that comes already configured in the router from the manufacturer 11) What type of network is best when using static routes (当使用静态路由时，何种类型的网络是最好的)？ A. A large network with hundreds of routers and networks B. A complex internetwork that changes often C. An autonomous system with multiple connections to other autonomous systems D. A small network with few routers and infrequent changes 12) What is an autonomous system (什么是自治系统)？ A. An area B. A domain C. A contiguous set of routers defined within a larger internetwork, that do not share routing information with the external internetwork D. All of the above E. None of the above 13) What is a default route (什么是默认路由)？ A. A type of static route B. A destination for any nonroutable packet C. Gateway of last resort D. All of the above E. None of the above 14) What type of information does a distance vector router build its routing table with (距离向量路由器用何种类型的信息来建立它的路由选择表)？ A. 呼叫packets B. Second-hand information C. LSPs D. First-hand information 15) What is the count to infinity problem (什么是无限计数问题)？ A. A routing loop that results from the way distance vector protocols use second-hand information B. The inability of routers to process more than 16 hops C. The excessive CPU overhead presented by distance vector algorithms D. The result of using both RIP and IGRP on the same internetwork 16) What is poison reverse (什么是破坏逆转)？ A. A change to the default update period timer B. A routing loop that occurs when using second-hand information to update route tables C. A router virus D. A version of split-horizon that sends back a “route unreachable” update to the router |
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题库精选:CCNA考试自测题第2卷
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