思科认证2022冲刺密卷案例分析题答案(10.27)

1. [单选题]PPP工作在OSI的哪一层（）

A. 物理层
B. 数据链路层
C. 网络层
D. 传输层

2. [单选题]After logging into a router and typing in a few show commands, you press the up arrow key. What will this do?

A. It will recall the previous command line
B. It will move the cursor one line up
C. It will redisplay the current command line
D. It will capitalize the command line
E. None of the above

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