[单选题]PPP工作在OSI的哪一层（）

正确答案 ：B

数据链路层

[多选题]The LAN needs are expanding at the Ezonexam corporate office, which is quickly growing. You are instructed to enlarge the area covered by a single LAN segment on the Ezonexam network.Which of the following are layer 1 devices that you can use? (Choose all that apply.)

正确答案 ：DE

A hub

A repeater

解析：解析：Explanation:

查看原题 查看所有试题