TCP IP Protocol, for beginners: The Ultimate Beginner's Guide to Learn TCP IP protocol Step by Step by Alves Claudia

Author:Alves, Claudia [Alves, Claudia]
Language: eng
Format: epub
Published: 2021-03-29T16:00:00+00:00

2)

closing the connection begins with the partner sending a control signal to the FIN. .

3)

both customers command to close at the same time.

Case 1 A local customer initiates a closure

In this case, a segment with a FIN signal is created and placed in a segment queue, After that, the TCP program will no longer accept any commands from this client to send data on a closed connection, and it goes into FIN-WAIT-1.

When the partner's TCP program confirms that the FIN signal will be received and sends its FIN signal here, the local program can confirm that the latter is receiving it. Note that the TCP program receiving the FIN signal will confirm it, but will not send its own FIN signal until its client also closes the connections.

Case 2 The TCP program receives a FIN signal from the network.

If an unclaimed FIN signal comes from the network, the TCP program that receives it can confirm that the connection is closed and notify its customer that the connection is closed.

Case 3 Both customers close the connection simultaneously. The simultaneous closure of the

connection by customers at both ends results in the exchange of segments with the FIN signal.

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TCP A

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TCP B

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