Shulou(Shulou.com)06/03 Report--

When a large number of files of the company's headquarters are transmitted to many places at home or abroad by FTP, we often encounter the inevitable delay packet loss in long-distance networks and cross-operators. How to solve this problem?

In fact, not only large files, but also all kinds of content transmitted on the network need to solve the problem of packet loss and damage. However, for large file transfers, packet loss and corruption may be more obvious.

There are two commonly used modes of transmission: TCP and UDP.

Traditional FTP uses TCP as the transport protocol. The advantage of TCP is that it is reliable and stable, and there is a three-way handshake to establish a connection before data is transmitted. Its disadvantages are slow data transmission, low efficiency, high occupation of system resources, and easy to be *. Therefore, there is no problem in using TCP to transmit in the network environment with low delay and low packet loss. if it is an unstable network environment and long-distance transmission, large file transfer, packet loss and damage will be more serious. If you drop a few bags in a row, the speed will drop to the freezing point. In the local area network or local network with operators can use FTP, such as long-distance file transfer or international file transfer or forget it, it will be desperate.

The advantage of UDP is that data transmission is fast and slightly more secure than TCP, while the disadvantage is that it is unreliable and unstable. UDP has more potential than TCP in fast transfer of large files and cross-border transfer. If it is an unstable network environment, the suggestion is still transmitted by UDP. At present, there are several high-speed transmission protocols based on UDP, such as CUTP protocol, which are used in large files, massive files, long-distance transmission and other scenarios.

At present, the solution manufacturers of file migration and sharing at home and abroad all use the upgrade protocol based on UDP as the transport layer protocol, which increases the reliability on the fast characteristics of UDP and solves the problem of low bandwidth utilization in long-distance file transfer. There are several large manufacturers such as IBM in the world have relevant solutions, and the domestic Ftrans fast transmission has also done a good job in this respect.

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