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Socket

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TCP Socket/Connection [/purple]

A TCP connection is done with a 3-way handshake between a client and a server. The following is a simplified explanation of this process.

• The client asks for a connection by sending a TCP segment with the SYN control bit set.
  
• The server responds with its own SYN segment that includes identifying information that was sent by the client in the initial SYN segment.
  
• The client acknowledges the server's SYN segment.
  

The connection is then established and is uniquely identified by a socket or socket pair.
(destination IP address, destination port number)
(source IP address, source port number)
During the connection setup phase, these values are entered in a table and saved for the duration of the connection.

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