Скачать или смотреть Learn Java Programming - SocketServer and Socket Part 1

This tutorial will continue expanding on concepts from my ServerSocket & Socket Introduction. I am going to create a server socket prime number calculator application that communicates over port 4141. The server socket will listen for the incoming client connections to provide a number, then the server will respond back with PRIME, COMPOSITE, or Invalid number. In addition to that I am going to throw in a little bonus knowledge on how part of the underlying Transmission Control Protocol/Internet Protocol (TCP/IP) actually functions. TCP was created way back in the 70's and has slowly evolved into the dominant method of transferring data. There are three things that I am going to go over in this video:

SYN - synchronize
ACK - acknowledge
FINAL - final

They form the basis for both establishing socket communications and terminating socket communications