2022计算机类考试思科认证模拟试题218

1. [单选题]通配符掩码和子网掩码之间的关系是（）。

A. 两者没有什么区别
B. 通配符掩码和子网掩码恰好相反
C. 一个是十进制^{(decimal system)}的，另一个是十六进制^{(hexadecimal system)}的
D. 两者都是自动生成的

2. [单选题]交换机转发数据到目的地依靠()

A. 路由表
B. MAC地址表
C. 访问权限表
D. 静态列表

3. [单选题]哪个命令可以成功测试网络：()

A. Router>ping192.5.5.0
B. Routerping192.5.5.30
C. Router>ping192.5.5.256
D. Routerping192.5.5.255

4. [单选题]介质100BaseT的最大传输距离是：()

A. 10m
B. 100m
C. 1000m
D. 500m

5. [单选题]把访问权限表应用到路由器端口的命令是：()

A. permit access-list 101 out
B. ip access-group 101 out
C. apply access-list 101 out
D. access-class 101 out

6. [单选题]路由器上的命令“show version”的功能是（）

A. 显示版本信息
B. 显示端口配置信息
C. 显示路由表
D. 显示路由协议信息

7. [单选题]默认情况下，RIP定期发送路由更新的时间是（）

A. 15S
B. 30S
C. 60S
D. 90S

8. [单选题]路由器当前的模式为“端口模式”，要退回到“特权模式”，应该使用的快捷键^{(shortcut key)}为（）

A. ctrl+b
B. ctrl+z
C. ctrl+c
D. ctrl+p

9. [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

10. [单选题]A Ezonexam technician is troubleshooting connectivity problems between two routers that are directly connected through the serial line. The technician notices that the serial line is up but cannot see any neighbors displayed in the output of the show cdp neighbors command.In which OSI layer is the problem most likely occurring?

A. Physical
B. Data link
C. Network layer
D. Transport layer
E. Application layer

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