Transport layer protocol-introduction of TCP protocol and the process of three-way handshake and four-time disconnection, and the difference with UDP protocol

TCP protocol introduction

TCP is a connection-oriented, reliable process-to-process communication protocol
TCP provides duplex services, and data can be transmitted in both directions at the same time

TCP segment

TCP divides several bytes into groups, called message segments,
TCP message segments are packaged in IP datagrams

TCP connection

Second handshake

Four disconnects

UDP protocol

The difference between TCP and UDP