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.Which statement best describes OSPF external LSAs (type 5)? 哪个选项正确的表述了OSFP外部的LSA ?

A. OSPF external LSAs are automatically flooded into all OSPF areas, unlike type 7 LSAs, which require that redistribution be configured.

B. External LSAs (type 5) are automatically changed to type 1 LSAs at ASBRs.

C. Type 5 LSAs are route summaries describing routes to networks outside the OSPF Autonomous System.

D. External network LSAs (type 5) redistributed from other routing protocols into OSPF are not permitted to flood into a stub area. 外部网络LSA类型为5重发布从其他路由协议到OSPF将不允许泛红到末节区域。 Answer: D

2. Refer to exhibits 1 and 2. A company uses a Metro Ethernet (Gigabit Ethernet) dedicated circuit to communicate between users (subnet B) and servers (subnet A) as shown in Exhibit 1. Both routers use OSPF to advertise the subnets. During a weekly management meeting, they realize that the WAN link is oversize. They have been using only 2 Mb/s in the worst-case scenario. So they propose a new, cheaper WAN connection using a 2-Mb/s Frame-Relay point-to-point link to interconnect both sites (Exhibit 2). The Frame Relay service provider informs them that multicast traffic is not allowed to run over the service provider network. Which one of these options is best to enable the company to establish the OSPF neighbor adjacency?

如图所示，1和2。在图1中一个公司使用一个专线网络(千兆网络)来连接用户(子网B) 和服务器(子网A)之间，两个路由器使用OSPF宣告子网。在每周的网络会议上，认识到 WAN网络带宽太大了。他们只是使用了2M的带宽。他们想使用一个更为便宜的WAN连接。 如图2是一个2M带宽的帧中继点到点线路。服务商告诉他们在网络中不能使用多播。要建立

OSPF邻居，需要做什么?

A. Use OSPF network broadcast, because it uses unicast to establish a neighbor relationship.

B. Use OSPF network point-to-multipoint, because it uses unicast to establish a neighbor relationship.

C. Use OSPF network point-to-point, because it uses unicast to establish a neighbor relationship.

D. Use OSPF network point-to-multipoint nonbroadcast, because it establishes a neighbor relationship using unicast packets.

OSPF使用网络类型是 点到多点非广播。因为这样建立邻居使用的是单播包

E. Use OSPF network nonbroadcast, because it establishes a neighbor relationship using multicast.

Answer: D

3. Refer to the exhibit. Which of these is applied to the Bearer class?如图所示，这个配置适用于哪些负载。

A. WRED

B. traffic shaping

C. packet marking

D. packet classification

E. FIFO queuing within the class

Answer: E

有类的先进先出的负载

4.Based on the network displayed in the exhibit, both PG-R1 and PG-R2 are configured as EIGRP stub routers. If the link between PG-R1 and PG-R3 is down, will PG-R3 still be able to reach 192.168.1.0/24, and why or why not? 在给出的网络图中，PG-R1 and PG-R2都配置了EIGRP stub，如果PG-R1 和 PG-R3中链路down掉了，PG-R3仍然能到192.168.1.0/24吗?为什么?

A. No. PG-R3 would remove its route to 192.168.1.0/24 through PG-R1, but would not query PGR2 for an alternate route, since PG-R2 is a stub.

B. No. The path through PG-R2 would always be considered a loop at PG-R3

.C. Yes. When a directly connected link fails, a router is allowed to query all neighbors, including stub neighbors, for an alternate route.

D. Yes, because PG-R3 would know about both routes, through PG-R1 and PG-R2, before the link between PG-R1 and PG-R3 failed.

Answer: A

5.On the basis of the exhibit provided, assuming that EIGRP is the routing protocol, then at R5, what would be the status of each path to 172.30.1.0/24? 在给出的图中，假设路由协议是EIGRP，在R5，将是什么状态在每条路径到 172.30.1.0/24?

A. the path through PG-R3 would be the successor, the path through PG-R1 would be a feasible successor, and the path through PG-R4 would be neither a successor nor a feasible successor

B. not enough information has been given to figure out what the status of each route would be

C. the path through PG-R3 would be the successor, and the paths through PG-R1 and PG-R4 would be feasible successors

D. the path through PG-R1 would be the successor, the path through PG-R3 would be a feasible successor, and the path through PG-R4 would be neither a successor nor feasible successor

Answer: A