单项选择题
A.enabling modular QoS over Frame Relay
B.enabling Real-Time Transport Protocol （RTP） header compression
C.enabling distributed compressed Transmission Control Protocol
D.enabling latency and jitter reduction for Transmission Control traffic
E.enabling TCP header compression
单项选择题 WhattypeofservicesareprovidedbytheCiscoIOSgatewaysinaVoIPnetworkwithCiscoCallMangerfunctionality？（）
单项选择题 TheAcmecompanyhasdeterminedthatduringitsbusiesthours，theaveragenumberofinternalVoIPcallsacrosstheWANlinkisfour（4）.Sincethisisanaverage，theWANlinkhasbeensizedforsix（6）callswithnocalladmissioncontrol.WhatwillhappenwhenaseventhcallisattemptedacrosstheWANlink？（）
单项选择题 Whencallsaredeniedbycalladmissioncontrol（CAC），thecallsarereroutedthroughthePSTNviatheuseofwhichCiscoCallManagerfeature？（）