Time in TCP state_ The role of wait?

TCP In state time_wait The role of

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• ​ ​ Preface ​​
• ​ ​ There are two reasons to do this ​​
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Preface

The client receives... From the server FIN Enter this state after the message , This is not a direct entry into CLOSED state , Also need to wait for a time timer to set the time .

There are two reasons to do this

1. Ensure that the last acknowledgment segment reaches . If B received A Confirmation message segment sent , Then it will resend the connection release request message segment ,A Waiting for a while is to deal with this situation .

2. Possible “ Invalid connection request message segment ”, In order to prevent this message segment from appearing outside this connection , Need to wait for a while .