Shulou(Shulou.com)06/01 Report--

1. Three handshakes

1) The server is in LISTEND, the client sends a request syn=1, ack=0, and the status is SYN_SEND.

2) The server receives the request and returns syn=1, ack=1, status SYN_RCVD

3) ESTABLISHED ESTABLISHED

2, four times disconnected

1) The client initiates a disconnection request and sends FIN=1, ack=0 packet status FIN_WAIT1.

2) The server receives the ACK packet status of the request reply from the client as CLOSE_WAIT.

3) The server sends a confirmation to the client that the FIN status is LAST_ACK, and the client status is FIN_WAIT2.

4) The client receives an acknowledgement from the server and replies to the ACK status as TIME_WAIT. After waiting for 2MSL, it becomes CLOSE.

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