Connect is responsible for sending SYN packets - Operating System

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• Nirja Shah   -Posted on 12 Nov 15
  - socket() creates a new socket of a certain socket type, which is identified by an integer number, and allocates system resources to it.
  
  - bind() is typically used on the server side, and associates a socket with a socket address structure, i.e. a specified local port number and IP address.
  
  - listen() is used on the server side, and it causes to bound a TCP socket to enter listening state.
  
  - connect() is used on the client side, and is assigned a free local port number to a socket. In case of a TCP socket, it causes an attempt to establish a new TCP connection.
  
  The following three way handshakes happens to establish the connection in TCP when connect() is called by client.
  1) The client requests a connection by sending a SYN (synchronize) message to the server.
  2) The server acknowledges this request by sending SYN-ACK back to the client.
  3) The client responds with an ACK, and the connection is established.

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