思科认证2022历年考试试题汇总(1AD)

1. [单选题]OSI七层模型中，“段”是哪一层数据封装的名称（）

A. 物理层
B. 数据链路层
C. 网络层
D. 传输层

2. [单选题]An administrator issues the show ip interface s0/0 command and the output displays that interface Serial0/0 is up, line protocol is up.What does "line protocol is up" specifically indicate about the interface?

A. The cable is attached properly.
B. CDP has discovered the connected device.
C. Keepalives are being received on the interface.
D. A carrier detect signal has been received from the connected device.
E. IP is correctly configured on the interface.

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