[单选题]How can a Ezonexam administrator determine if a router has been configured when it is first powered up?

正确答案 ：C

An un configured router goes into the setup dialog

解析：解析：Explanation:

[单选题]哪一个命令可以设置路由器特权用户的“明文密码”（）

正确答案 ：A

enable password

[多选题]With regard to Ethernet media access methods, which of the following are true?(Choose all that apply.)

正确答案 ：BC

A device listens and waits until the media is not busy before transmitting.

All devices on an Ethernet segment see data that passes on the network medium.

解析：解析：Explanation:

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