思科认证CCIE认证考试模拟试题及答案

2016年思科认证CCIE认证考试模拟试题及答案

　　思科认证主要考试内容是什么?今天yjbys小编为大家分享的是思科认证考试模拟试题及答案，仅供同学们复习参考!

　　1. Before inserting a new switch in the network, the network administrator checks that the VTP domain name is correct, the VTP mode is set to server, and revision is lower than the switches in the network. The administrator then configures interfaces and trunks, erases existing VLANs, and connects the switch to the network. Following that procedure, there is no connectivity in the network. What is a possible cause of this problem?

　　之前在网络中加入了一个新的交换机，网络管理员检查VTP域名是正确的。VTP模式设置为 服务器，修订号也比其他的交换机低。管理员配置接口和Trunk。清空了所有的VLAN后吧 交换机连接入网络。经过这些操作，交换机没有任何的网络连接。这是什么问题?

　　A. Because the configuration revision of the new switches is lower than the rest of the network, it can change the VLAN database of the other switches. B. As a VTP server, the new switch deleted all VLANs of the network. C. Erasing VLANs increases the VTP configuration revision.

　　清空VLAN 会影响到VTP的修订号

　　D. Since the configuration revision of the network is higher than the new switch, the VLAN database was automatically synchronized.

　　Answer: C www.Examw.com

　　2. While deploying a new switch, you accidently connect ports 3/12 and 3/18 together, creating a loop. STP detected it and placed port 3/18 in blocking mode. Why did STP not place port 3/12 in blocking mode instead?

　　当部署一个新的交换机，你无意的链接了3/12/和3/18，形成了一个环路，STP把3/18端口 设置为阻断端口，为什么没有把3/12设置为阻断端口呢?

　　A. Port 3/12 was already up and forwarding before the loop was created. B. Port priority is based on lowest priority and lowest port number. 因为端口ID 3/12比较低 C. You connected the wire on port 3/18 last. D. None of the above, it is purely random. Answer: B

　　3. Two routers configured to run BGP have been connected to a firewall, one on the inside interface and one on the outside interface. BGP has been configured so the two routers should peer, including the correct BGP session endpoint addresses and the correct BGP session hop-count limit (EBGP multihop). What is a good first test to see if BGP will work across the firewall?

　　有两个运行BGP的路由器连接到防火墙， 一个在inside接口， 一个在outside 接口。 BGP 已经配置并且已经成为了邻居，包含正确的配置了BGP网络地址和正确的BGP跳数的限制 (EBGP的多跳设置)，怎么能够最好的测试BGP工作在防火墙上。

　　A. Attempt to TELNET from the router connected to the inside of the firewall to the router connected to the outside of the firewall. If telnet works, BGP will work, since telnet and BGP

　　both use TCP to transport data.

　　用在inside接口上的路由器telnet 到在outside 接口上的路由器。如果telnet 正常工作侧说明 BGP能正常工作，因为telnet 和BGP 都是使用TCP 来传输数据的

　　B. Ping from the router connected to the inside interface of the firewall to the router connected to the outside interface of the firewall. If you can ping between them, BGP should work, since BGP uses IP to transport packets. C. There is no way to make BGP work across a firewall without special configuration, so there is no simple test that will show you if BGP will work or not, other than trying to start the peering session. D. There is no way to make BGP work across a firewall.

　　Answer: A

　　4. Refer to the exhibit. In this network, R1 has been configured to advertise a summary route, 192.168.0.0/22, to R2. R2 has been configured to advertise a summary route, 192.168.0.0/21, to R1. Both routers have been configured to remove the discard route (the route to null created when a summary route is configured) by setting the administrative distance of the discard route to 255.

　　如图所示，在这个网络中，R1通告了192.168.0.0/22的汇总路由给R2， R2通告了192.168.0.0/21的汇总路由给R1。两台路由器都配置了汇总路 由的null0 接口来防止路由的环路。发生什么情况，R1能收到一个去192.16 8.3.1的数据包?

　　What will happen if R1 receives a packet destined to 192.168.3.1? A. The packet will loop between R1 and R2. 这个包在R1和R2之间形成了环路 B. It is not possible to set the administrative distance on a summary to 255. C. The packet will be forwarded to R2, where it will be routed to null0. D. The packet will be dropped by R1, since there is no route to 192.168.3.1.

　　Answer: A

　　5. Refer to the exhibit. In this network, R1 is configured not to perform autosummarization within EIGRP. What routes will R3 learn from R2 through EIGRP?

　　如图所示，在这个网络中 R1配置为在EIGRP中不做自动汇总，那么R3能从R2学到什么 EIGRP的路由信息。

　　A. 172.30.1.0/24 and 10.1.2.0/24; EIGRP only performs autosummarization at the edge

　　between two major networks.www.Examw.com

　　172.30.1.0/24 和 10.1.2.0/24 EIGRP在两个较大的网络边缘只能执行自动汇总。

　　B. 172.30.0.0/16 and 10.1.2.0/24; R2 will perform autosummarization, although R1 will not. C. Since R2 is configured without autosummarization, it will not propagate the 172.30.1.0/24 route. D. 172.30.0.0/8 and 10.0.0.0/8. Answer: A