下列关于与OSI模型关系的叙述，正确的是（)。A．TCP/IP应用层汇集了OSI模型中的会话层、表示层和应用

A.CHAP uses a two-way handshake

B.CHAP authentication periodically occurs after link establishment

C.CHAP has no protection from playback attacks

D.CHAP authentication is performed only upon link establishment

E.CHAP uses a three-way handshake

F.CHAP authentication passwords are sent in plaintext

A.pingaddress

B.tracertaddress

C.tracerouteaddress

D.arpaddress

A.阻塞

B.学习

C.丢弃

D.转发

E.侦听

A.当他们收到一个特殊的记号

B.当有载波

C.当他们没有检测到其他设备发送

D.当介质是空闲

E.当服务器授予访问权限

A.增加安全性

B.专用带宽

C.提供分割

D.允许交换机子接口间路由通信

E.包含冲突

A.增加冲突域的大小

B.允许逻辑划分网段

C.增强网络安全

D.当减少冲突域时增加广播域的大小

E.减少广播域的大小时增加了广播域个数

F.简化交换机管理

A.Theswitchwillnotforwardunicastframes.

B.Theswitchwillforwardtheframetoaspecificport.

C.Theswitchwillreturnacopyoftheframeoutthesourceport.

D.TheswitchwillremovethedestinationMACfromtheswitchtable.

E.Theswitchwillforwardtheframetoallportsexcepttheportonwhichitwasreceived.

A.Firmware-levelvirusdetection

B.Signature-basedvirusfiltering

C.Layer4virusdetection

D.Signature-basedspywarefiltering

A.canbeusedoveranalogcircuits

B.mapsLayer2toLayer3address

C.encapsulatesseveralroutedprotocols

D.supportsIPonly

E.provideserrorcorrection

A.802.3ad

B.802.1w

C.802.1Q

D.802.1d