多项选择题
A. H·323
B. UDP
C. RTP
D. TCP
E. Media Gateway Control Protocol (MGCP)
F. session initiation protocol (SIP)
单项选择题 AcmeCompanyhasseveralofficesaroundthecountry.ThecompanyhasdeployedaVoIPnetworkwithCiscoUnifiedCallManagerinamultisitecentralizedconfigurationbutthereisarequirementtoplaceacallagentatsomeoftheremotesites.WhichIOSgatewayfeatureshouldbedeployedattheremotesitetoenablelocalcallcontrol?()
单项选择题 UsingtheG.729codecandthedefaultcRTPconfiguration,whatistheapproximateVoIPbandwidthsavingsacrossaFrameRelaylinkthataddsa6byteframeheader?"()
多项选择题 Whichtwostatementsabouttheopenandsharedkeywireless-authenticationmethodsaretrue?()