Session Initiation Protocol (SIP) is a signaling protocol used to ascertain, preserve, and terminate real-time classes that embody voice, video, and information communications. It’s broadly used for Voice over IP (VoIP) and video conferencing purposes.
SIP is a text-based protocol that makes use of a request-response mannequin. A consumer sends a request to a server, and the server responds with a response. The request and response messages are formatted utilizing the Session Description Protocol (SDP). SDP describes the media codecs and codecs which might be used within the session.