TCP Three-Step Handshake

Client requests a connection by sending SYNchronize massage to Server.

Server ACKnowledgement this request by sending SYN,ACK back to Client.

Then, Client receives SYN, ACK from Server and responds with ACK packet .



TCP ( transmission control protocol ) define RFC 793.

It uses IP( internet protocol ) for transporting data from one node to another .

TCP/IP has 65535 ports.

Well-known ports are from 0 - 1023.

Register ports are from  1024 - 49151  that used by applications and services .

Dynamics or private ports are from  49152 - 65535 that are not assigned to any protocol and can use in any application and service .