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This article mainly introduces what the sip protocol refers to, which has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, let the editor take you to understand it.

Sip protocol refers to the session initiation protocol, which is a multimedia communication protocol developed by IETF. SIP is an application layer signaling control protocol, which is used to create, modify and release the session of one or more participants. It is an IP voice session control protocol originated from the Internet, which is flexible, easy to implement and easy to expand.

The operating environment of this tutorial: windows7 system, Dell G3 computer.

SIP (session initiation Protocol)

SIP (Session Initiation Protocol, session initiation Protocol) is a multimedia communication protocol developed by IETF (Internet Engineering Task Force, Internet Engineering Task Force).

SIP is a text-based application layer control protocol used to create, modify, and release sessions of one or more participants. These sessions can be Internet multimedia conferences, IP phones, or multimedia distributions. Participants in the session can communicate through multicast (multicast), mesh unicast (unicast), or a combination of both.

SIP is an IP voice session control protocol originated from the Internet, which is flexible, easy to implement and easy to expand.

SIP interoperates with Resource Reservation Protocol (RSVP), which is responsible for voice quality. It also collaborates with several other protocols, including lightweight Directory access Protocol (LDAP) for location, remote Authentication Dial-in user Service (RADIUS) for authentication, and RTP for real-time transport.

With the progress of computer science and technology, the IP data network based on packet switching technology has replaced the core position of the traditional telephone network based on circuit switching in the communication field because of its convenience and low price. As an application layer signaling control protocol, SIP provides complete session creation and session change services for a variety of instant messaging services. Therefore, the security of SIP protocol plays a vital role in the security of instant messaging.

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