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TCP is a reliable transmission and why the application layer has to be verified

Source: Internet
Author: User
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There has been this confusion before. One of the better explanations I've seen at the moment is that for the TCP layer, it's just the concept of data flow, and the logical semantics of data are not guaranteed, like

The correctness of the data is not guaranteed, for example, if the data has been tampered with, it is a protection of the application layer. One more thing I think of myself is, for example, you have a

File server, TCP does guarantee that every TCP packet arrives, but the correctness of your application is not guaranteed, such as during the transfer of your files, your program

In the logic of some error, not to put a file shard into the TCP stack, then the other side of course the best to get is a broken file.

TCP is a reliable transmission and why the application layer has to be verified

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