[单选题]OSI七层模型中,数据链路层的数据封装名称为()
正确答案 :B
帧
[单选题]两台路由器直连到一起,应该使用的线缆为()
正确答案 :A
交叉线缆
[单选题]What is the purpose of the Spanning Tree Protocol (STP)?
正确答案 :D
To maintain a loop-free Layer 2 network topology
解析:解析:Explanation:
[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]哪个ACL可允许主机10.220.158.10访问web服务器192.168.3.244()
正确答案 :D
access-list 101 permit tcp 10.220.158.10 0.0.0.0 host 192.168.3.224 eq 80
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