Session backup method and device of multi-channel protocol
A multi-channel and backup technology, which is applied in the session backup field of multi-channel protocols, can solve the problems that the master session and the slave session cannot be associated, the transmission fails, and the master session for the control connection and the slave session for the data connection cannot be determined.
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[0032] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be described in detail below in conjunction with the drawings in the embodiments of the present invention.
[0033] In network communication, for multi-channel protocols, such as FTP, RTSP and SIP, when transmitting data, generally two types of connections can be established, one is a control connection and the other is a data connection. Both parties can communicate based on a control connection Negotiate multiple ports and IP addresses for multiple data connections. The control connection is mainly used for the transmission of control information, and the control connection can negotiate the port information for establishing a data connection, etc.; the data connection is used for data transmission. During data transfer, the control connection remains connected. If the master sessio...
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