TCP Three-Way Handshake (SYN, SYN-ACK, ACK)

To establish a connection  each device must send a SYN and receive a ACK for it from the other device. The TCP three-way Handshake in Transmission Control Protocol also call as TCP-handshake is the method used by TCP set up a TCP/IP connection over a Internet protocol based network..

ACK :- Acknowledgement field significant.
SYN :- Synchronize sequence numbers.