InaVoIPnetwork，whichthreecallsignalingprotocolsaresupportedbytheCiscoCallManagerforcallsetup，callmaintenance，andcallteardown？（）A.H323B.UDPC.RTPD.TCPE.Media Gateway Control Protocol (MGCP) F.session initiation protocol (SIP)

多项选择题

In a VoIP network， which three call signaling protocols are supported by the Cisco CallManager for call setup， call maintenance， and call teardown？（）

A.H323
B.UDP
C.RTP
D.TCP
E.Media Gateway Control Protocol (MGCP)
F.session initiation protocol (SIP)

CCNP(642-845)