TCP Three-Way Handshake - Network Encyclopedia
TCP 3-Way Handshake is a method of initializing a Transmission Control Protocol session between two hosts on a TCP/IP network. The handshake establishes a logical connection between the hosts by synchronizing the sending and receiving of packets and communicating TCP parameters between the hosts.
The initiating host sends a TCP packet requesting a new session.
The target host sends a TCP packet with its own sequence number and an ACK of the initiating host’s sequence number.
The initiating host sends an ACK containing the target sequence number that it received.
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