正确答案: C

包

题目：OSI七层模型中，网络层的数据封装名称为（）

解析：C

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举一反三的答案和解析：

[单选题]命令“ping127.0.0.1”的功能是（）

测试TCP/IP协议是否正常

[单选题]路由器上激活端口的命令是（）

no shutdown

[单选题]Study the Exhibit below carefully:London#show vtp

Forwards information about VTP configuration.

解析：解析：Explanation:FromtheoutputthisswitchisoperatingmerelyasVTPclient,soitbasicallydoesastheVTPserversays,andpassesoninformationaboutVTPconfigurationtothenextswitchinline.IncorrectAnswers:A.Thisisincorrectbecausethefunctionisredundant.B.ThisincorrectbecausetheswitchmustbeinserverortransparentmodetocreateandchangeVLANs.D.ThisisincorrectbecauseifVTPwouldbedisabled,itwouldn'tappearonthecommandoutput.E.Ifthisweretrue,theVTPconfigurationinformationwouldnotbedisplayedafterbeingpoweredon.

[单选题]OSI七层模型中，数据链路层的数据封装名称为（）

帧

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

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:

[单选题]IP扩展访问列表的数字标示范围是多少（）。

100-199