The Session Initiation Protocol (SIP) is a signaling protocol used to establish, modify, and terminate multimedia sessions such as voice and video calls over the Internet. It is a text-based protocol that uses a client-server model, where a SIP client sends requests to a SIP server, which then responds with the appropriate response.
SIP is an important protocol because it provides a standard way to establish and manage multimedia sessions. It is also used in a variety of applications, such as VoIP, video conferencing, and instant messaging. SIP is a relatively new protocol, but it has quickly become the standard for multimedia sessions over the Internet. It is a powerful and flexible protocol that can be used in a variety of applications.
