单项选择题
CiscoUnifiedCommunications500SeriesforSmallBusiness，acriticalpartoftheCiscoSmartBusinessCommunicationsSystem，isaunifiedcommunicationssolutionforsmallbusinessesthat providesvoice，data，voicemail.ForwhichtechnologytheCiscoUC520providesintegratedWLAN connectivitytomobileclients？（）
A.voiceonly
B.dataonly
C.dataandvoice
D.Noneofabove
- A.ForwhichtechnologytheCiscoUC520providesintegratedWLAN
B.voiceonly
C.dataonly
D.dataandvoice
E.Noneofabove
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lightweightaccesspointhasbeenconnectedtoacatalyst355024－pwrswitch，andonpower－uptheaccesspointfails.Whatistheproblemwiththeswitch？（）
A.thepowersupplyhasinadequatewattage.
B.powerisincorrectlyconfiguredontheport.
C.itdoesnotsupport802.3afpoe.
D.powerisnotenabledontheport. -
单项选择题
Givenabridgelink6miles（9.7km）long，whichparameterontherootradiointerfacepagemustbeconfiguredinorderforiptraffictopass？（）
A.rts
B.distance（kilometers）
C.concatenation
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WhichconfigurationshouldbedoneinordertoimprovetheperformanceoftheCiscoUnifiedWireless IPPhone7921GinaWLANinfrastructure?（）
A.enableaggressiveloadbalancing
B.enablecoverageholedetection
C.disabledynamictransmitpowercontrol
D.enableshortpreamble
