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TCP Three-time handshake
TCP provides a reliable connection service with three handshake confirmations to establish a connection.
There are 6 kinds of TCP flag bits.
syn:synchronous is set up online.
The three-time handshake relies mainly on the SYN and ACK flag bits.
The handshake detailed flowchart is as follows.
The simplified steps can be described as.
a send syn=j to B.
After b detection, send ack=j+1,syn=k to a.
After a detection, send ack=k+1 to B.
The connection is successful.
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