单项选择题 CiscoUnifiedCommunications500SeriesforSmallBusiness，acriticalpartoftheCiscoSmartBusinessCommunicationsSystem，isaunifiedcommunicationssolutionforsmallbusinessesthat providesvoice，data，voicemail.ForwhichtechnologytheCiscoUC520providesintegratedWLAN connectivitytomobileclients？（）A.voiceonlyB.dataonlyC.dataandvoiceD.Noneofabove

单项选择题 lightweightaccesspointhasbeenconnectedtoacatalyst355024－pwrswitch，andonpower－uptheaccesspointfails.Whatistheproblemwiththeswitch？（）

单项选择题 Givenabridgelink6miles（9.7km）long，whichparameterontherootradiointerfacepagemustbeconfiguredinorderforiptraffictopass？（）