[单选题]At which layer of the OSI model does the protocol that provides the information displayed by the "show cdp neighbors" command operate?

正确答案 ：D

Data link

解析：解析：Explanation:

[单选题]OSI第二层数据封装完成后的名称是：()

正确答案 ：C

帧

查看原题 点击获取本科目所有试题