2022计算机类考试思科认证全套模拟试题308

1. [单选题]对于使用链路状态路由协议的路由器如何选择最佳路线到达子网，下列哪项是正确的（）

A. 路由器会发现链路状态数据库中的最佳路由
B. 通过针对链路状态数据库中的信息运行SPF算法，路由器会计算出最佳路由
C. 路由器将比较每个邻居接收到的更新中为子网列出的标准，并挑选最佳标准路由
D. 路由器会使用具有最低条数的路径

2. [单选题]标准访问控制列表应被放置的最佳位置是在（）。

A. 越靠近数据包的源越好
B. 越靠近数据包的目的地^{(destination)}越好
C. 无论放在什么位置都行
D. 入接口方向的任何位置

3. [单选题]命令“ping127.0.0.1”的功能是（）

A. 测试网卡是否正常
B. 测试网关是否正常
C. 测试TCP/IP协议是否正常
D. 测试介质是否正常

4. [单选题]路由器上，命令“show int s0”的显示结果为：Serial0 is up,line protocol is down出现该结果的可能原因是（）

A. 端口处于关闭状态
B. 物理端口被烧毁
C. 两端设备协议不一致
D. 路由表中无路由

5. [单选题]帧中继^{(frame relay)}环境中，CIR的含义是（）

A. 提高线路速率
B. 保证线路速率
C. 降低线路速率
D. 配置线路速率

6. [多选题]As the Ezonexam network administrator, you are required to have a firm understanding of the OSI model. Why does the data communication industry use the layered OSI reference model? (Choose two)

A. It enables equipment from different vendors to use the same electronic components, thus saving research and development funds
B. It encourages industry standardization by defining what functions occur at each layer of the model
C. It divides the network communication process into smaller and simpler components; thus aiding component development, design and troubleshooting
D. It provides a means by which changes in functionality in one layer require changes in other layers
E. It supports the evolution of multiple competing standards and thus provides business opportunities for equipment manufacturers

7. [单选题]A Ezonexam PC has the IP address 172.16.209.10 /22. What is the subnet of this address?

A. 172.16.42.0
B. 172.16.107.0
C. 172.16.208.0
D. 172.16.252.0
E. 172.16.254.0

8. [单选题]After working all night and successfully configuring a Cisco router for the Ezonexam network you save your changes on the startup config, reboot the router, and go out for a cigarette. When you return, none of your changes are active and the router boots to the initial configuration mode! Which of the choices below indicates the source of your problem?

A. Hardware failure in NVRAM prevents the router from loading the config
B. Startup-config in flash is corrupt and cannot be analyzed
C. Router configuration-register set to bypass startup configuration
D. Startup-config in NVRAM is corrupt and cannot be analyzed
E. None of the above

9. [多选题]The Ezonexam network administrator issues the ping 192.168.2.5 command and successfully tests connectivity to a host that has been newly connected to the network. Which protocols were used during the test? (Choose two)

A. ARP
B. CDP
C. DHCP
D. DNS
E. ICMP

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