哪种 Cisco IOS 模式会显示 Router# 的提示？ Which Cisco IOS mode displays a prompt of Router#?
A. 全局配置模式 global configuration mode
B. 设置模式 setup mode
C. 用户执行模式 user EXEC mode
D. 特权执行模式 privileged EXEC mode
在对网络问题进行故障排除时，网络管理员在路由器上发出 show version 命令。使用这个命令可以查到什么信息？ While troubleshooting a network problem, a network administrator issues the show version command on a router. What information can be found by using this command?
A. 接口的带宽、封装和 I/O 统计信息 the bandwidth, encapsulation, and I/O statistics on the interfaces
B. 备份配置和当前运行配置之间的差异 differences between the backup configuration and the current running configuration
C. 路由器上运行的路由协议的版本 the version of the routing protocol that is running on the router
D. 安装在路由器上的 NVRAM、DRAM 和闪存的数量路由器 the amount of NVRAM, DRAM, and flash memory installed on the router
IOS 命令结构中的术语关键字和参数有什么区别？ What is the difference between the terms keyword and argument in the IOS command structure?
A. 输入的关键字具有预定义的长度。参数可以是任意长度。 A keyword is entered with a predefined length. An argument can be any length.
B. 关键字是特定的参数。参数不是预定义的变量。 A keyword is a specific parameter. An argument is not a predefined variable.
C. 完成命令需要关键字。参数不是。 A keyword is required to complete a command. An argument is not.
D. 关键字总是直接出现在命令之后。一个论点没有。 A keyword always appears directly after a command. An argument does not.
哪个命令或组合键允许用户返回到命令层次结构中的上一级？ Which command or key combination allows a user to return to the previous level in the command hierarchy?
A. Ctrl-C Ctrl-C
B. 退出 exit
Ctrl-Z Ctrl-Z
D. 结束 end
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