What is SIP?

Haha, if you have never touched network programming, don't look down.

 

Give a definition first:

 

SIP (Session Initial Protocol) is a signaling protocol that is used to set up, modify and terminate sessions, like Internet phone calland multimedia conferences between two participant ants.

For Translation:

SIP is a signaling protocol used to establish, modify, and terminate sessions, such as network calls and Multimedia conferences.

What does it mean? FTP is also a network protocol. Like SIP, it is also an application layer protocol. (

* @ W & * What is the application layer protocol? Ask the Computer Basics teacher ).

FTP is the protocol used to transmit files. However, when you establish a session, log on to Alibaba, and verify that everything is associated with the transmission.

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SIP is different. It is only responsible for session connections and not for specific media transmission.

For A specific application, Mr. A wants to chat with the beauty online, and the SIP is only responsible for helping Mr. A dial the beauty, but in the future, the network package used by two people to chat will not use the SIP. When A phone call is closed, SIP is responsible for terminating the session for Mr..

What are the benefits of doing so? The SIP server is only required for outbound and terminated work, and two people will not be able to use the server bandwidth in the future, which is particularly beneficial for dealing with network congestion.

Well, let's talk about it first. I wish you all a beautiful girl.