单项选择题

Youandaco－workerhaveestablishedwirelesscommunicationdirectlybetweenyourwirelesslaptops.Whattypeofwirelesstopologyhasbeencreated?（）

A.BSS
B.ESS
C.IBSS
D.SSID

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单项选择题

Anetworkadministratorneedstoforceahigh－performanceswitchthatislocatedintheMDFtobecometherootbridgeforaredundantpathswitchednetwork.Whatcanbedonetoensurethatthisswitchassumestheroleasrootbridge?（）

A.Establishadirectlinkfromtheswitchtoallotherswitchesinthenetwork.
B.AssigntheswitchahigherMACaddressthantheotherswitchesinthenetworkhave.
C.Configuretheswitchsothatithasalowerprioritythanotherswitchesinthenetwork.
D.Configuretheswitchforfull-duplexoperationandconfiguretheotherswitchesforhalf-duplexoperation.
E.ConnecttheswitchdirectlytotheMDFrouter，whichwillforcetheswitchtoassumetheroleofrootbridge.

单项选择题

Whywillaswitchneverlearnabroadcastaddress?（）

A.Broadcastsonlyusenetworklayeraddressing.
B.Abroadcastframeisneverforwardedbyaswitch.
C.Abroadcastaddresswillneverbethesourceaddressofaframe.
D.Broadcastaddressesuseanincorrectformatfortheswitchingtable.
E.Broadcastframesareneversenttoswitches.