- the communication between multimedia devices.
- SIP makes the communication possible thanks to:
- RTP/RTCP(used to transport voice data in real time)
- SDP(used to negotiate the participant capbilities)
3. an application-layer control protocol
4. a signaling protocol for Internet Telephony
5. establish sessions for features such as audio/video conferencing, interactive gamimg and call forwarding to be deployed over IP networks
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