思科认证：CCNA认证考前精选模拟试题2
思科知识的学习在一定基础上还是有些难度，为了帮助考生们复习好《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。
1. Refer to the exhibit. Routers A and B are directly connected. Given the configuration, how many EIGRP routes will router B see in its routing table?如图所示，路由器A和B直接相连，这样配置让路由器B得到多少路由表?
A. 0
B. 1
C. 2
D. 3
E. 4
Answer: A
2. Loop guard and UniDirectional Link Detection both protect against Layer 2 STP loops. In which two ways does loop guard differ from UDLD in loop detection and prevention? (Choose two.)
环路检测和单向链路检测，保证2层STP没有环路。这两种做法不同于UDLD中的环路检测 吗?
A. Loop guard can be used with root guard simultaneously on the same port on the same VLAN while UDLD cannot.
B. UDLD protects against STP failures caused by cabling problems that create one-way links.
UDLD 是为了防止电缆故障，造成一个单向故障
C. Loop guard detects and protects against duplicate packets being received and transmitted on different ports.
D. UDLD protects against unidirectional cabling problems on copper and fiber media. E. Loop guard protects against STP failures caused by problems that result in the loss of BPDUs from a designated switch port.
Answer: BE
3. Two BGP peers connected through a routed firewall are unable to establish a peering relationship. What could be the most likely cause?
两个直连BGP邻居，无法通过防火墙建立邻居关系，最有可能是什么原因?
A. BGP peers must be Layer 2-adjacent. B. EBGP multihop is not configured. EBGP邻居的多跳没有设置 C. The firewall is not configured to allow IP protocol 89. D. The firewall is not configured to allow UDP 179.
Answer: B
4. Which two of these steps are minimum requirements to configure OSPFv3 under IPv6? (Choose two.) 需要哪两个步骤开始用最基本在IPv6上使用OSPFv3协议 A. Configure a routing process using the command ipv6 router ospf [process-id]. B. Add the network statement for the interfaces on which OSPF will run. C. Configure OSPF on the interface that it will run on. D. Use the passive-interface command on the interfaces on which OSPF should not run. E. Enable routing.
Answer: CE
5. Refer to the exhibit. Routers A and B are directly connected and running EIGRP, but they are unable to form a neighbor relationship. What is the most likely cause?如图所示，路由器A和B直接连接并且都运行EIGRP，但是它们没有成为邻居，这是什么问 题
A. The network statements are misconfigured. B. The IP address statements are misconfigured. C. The autonomous system is misconfigured. D. There is a physical issue with the cable.
Answer: B
编辑推荐：