In a VoIP network, which three call signaling protocols are supported by the Cisco CallManager for call setup, call maintenance, and call teardown? ()
- A、 H·323
- B、 UDP
- C、 RTP
- D、 TCP
- E、 Media Gateway Control Protocol (MGCP)
- F、 session initiation protocol (SIP)
正确答案:A,E,F
答案解析:有
微信扫一扫手机做题