多项选择题
A.minimum bandwidth guarantee
B.average bandwidth guarantee
C.optimum bandwidth guarantee
D.maximum bandwidth rate
E.IP precedence F priority
单项选择题 AcmeCompanyhasofficesaroundthecountry.WiththeuseofCiscoUnifiedCallManager，thecompanyhasdeployedaVoIPnetworkinamultisitecentralizedconfiguration.WhichIOSgatewayfeatureshouldbedeployedtoenableVoIPdevicestoregisterwithalocalgatewayandcontinuetofunctionwhentheconnectiontotheCiscoUnifiedCallManagerisbroken？（）
单项选择题 WhichQoSpreclassificationoptionwillrequiretheuseoftheqospre-classifycommandfortheVPNtraffic？（）
多项选择题 WhichtwostatementsabouttheWiredEquivalentPrivacy（WEP）encryptionmechanismaretrue？（）