为了帮助广大考生系统全面的复习好《思科认证：CCNA认证学科》，我们考吧网整理了思科认证模拟试题，本次汇编的模拟试题希望对你的考试有所帮助，预祝你考试顺利。

推荐阅读：思科认证：CCNA认证考前经典试题训练汇总三

1.Observe the following network presented in this exhibit carefully. Assume that

all routers are running EIGRP in AS 100 on all connected links. If the link between PG-R3 and PG-R4 is down,how many queries will PG-R5 and PG-R6 receive? 对列出的拓扑图仔细观察，如果所有的路由器运行EIGRP 100在所有的链接上，如 果PG-R3 and PG-R4间的link down掉，有多少个查询PG-R5 and PG-R6将会收到

A. PG-R6 will receive two queries, one for 192.168.1.0/24 and one for 192.168.2.0/24. PG-R5 will receive one query, for 192.168.1.0/24. B. PG-R5 will receive one query, for 192.168.1.0/24, and PG-R6 will receive no queries C. Both PG-R5 and PG-R6 will receive two queries, one for 192.168.1.0/24 and one for 192.168.2.0/24 D. Neither PG-R5 nor PG-R6 will receive any queries for either 192.168.1.0/24 or 192.168.2.0/24.

Answer: A

2. Refer to the exhibit. According to the output of the command show tag-switching forwarding-table, which four of these statements are true? (Choose four.)

如图所示，根据show tag-switching命令的输出的结果，以下那四句话是对的

A. Packets to the IP address 10.10.10.5/32 will be tagged with "17" toward the next hop. B. Label "19" will be advertised to MPLS neighbors so that they can use this label to reach the IP address 10.10.10.6/32. C. IP address 10.10.10.4/32 is directly connected to the neighbor router on serial 3/0. D. Packets arriving with label "17" will be forwarded without any label toward serial 4/0. E. Packets arriving with label "20" will be forwarded with label "21" after label-swapping. F. Label "20" is advertised to MPLS neighbors so that they can use this information to reach the prefix 10.10.10.8/32.

Answer: CDEF

3.This question is about the formation of OSPF adjacency. An OSPF adjacency will not form correctly across a point-to-point link in the same area. Which would most likely cause this problem? 这个问题是关于OSPF邻接关系的形成， 一个OSPF的邻接将不会形成正确穿过点到 点链路在同一区域。哪个是最有可能的原因? A. Each interface has a different OSPF cost. B. Each interface is configured with secondary addresses as well as primary addresses. C. Each interface has a different MTU size. 每个接口都有不同大小的MTU D. Each interface is configured with theip unnumbered loopback 0 command.

Answer: C

4. A network is composed of several VRFs. It is required that VRF users VRF_A and VRF_B be able to route to and from VRF_C, which hosts shared services. However, traffic must not be allowed to flow between VRF_A and VRF_B. How can this be accomplished?

标签转发表

一个网络有一个组合成的虚拟路由转发表， 这个表必须让用户VRF_A和B 能有到C并且返回 的路由。他提供主机的共享服务，但是同时不能让A和B之间相互通信，怎么能做到这个

A. route redistribution B. import and export using route descriptors C. import and export using route targets D. Cisco MPLS Traffic Engineering

Answer: C

5. A request arrived on your MPLS-vpn-bgp group. Due to a security breach, your customer is experiencing DoS attacks coming from specific subnets (200.0.10.0/24, 200.0.12.0/24). You have checked all MPLS-EBGP routes being advertised to BHK from other VPN sites and found four subnets listed: 200.0.10.0/24, 200.0.11.0/24, 200.0.12.0/24, 200.0.13.0/24. You immediately apply an outbound ACL filter using the appropriate MPLS-EBGP tool: access-list 1 deny 0.0.0.0 255.255.254.255 access-list 1 permit any What happens when you apply this ACL on the MPLS-EBGP connection to BHK?

在进口和出口都使用标记路由

一个请求到达你的MPLS-VPN-BGP组， 由于安全漏洞， 你的客户经历了DoS工具从特殊的子 网(200.0.10.0/24, 200.0.12.0/24)，你要检查所有的MPLS-EBGP routes存在被通告给BHK从其

他VPN站点和找到你的子网列表200.0.10.0/24, 200.0.11.0/24, 200.0.12.0/24, 200.0.13.0/24.你 立即应用了一个出站的ACL过滤在MPLS-EBGP 工具：access-list 1 deny 0.0.0.0 255.255.254.255 access-list 1 permit any A. It blocks all routes. B. It blocks the routes 200.0.12.0/24, 200.0.10.0/24 only. 当你应用了你的这个ACL在 MPLS-EBGP连接到BHK后会发生什么?(没翻译好，各位自己理解)

这个组只有200.0.12.0/24和200.0.10.0/24的路由

C. It blocks the routes 200.0.12.0/24, 200.0.13.0/24 only. D. It blocks the routes 200.0.10.0/24, 200.0.13.0/24 only. E. Nothing happens, no routes are blocked.

Answer: B