What is the difference between TCP and UDP?

TCP and UDP The difference between

​  ​ Transmission control protocol TCP Characteristics ​​​  ​ User datagram protocol UDP Characteristics ​​

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Transmission control protocol TCP Characteristics

(1) TCP Connection oriented transport layer protocol

(2) Every one of them TCP A connection can only have two ports , namely ： Point to point

(3) TCP Provide reliable delivery of services

(4) TCP Provide full duplex communication

(5) Byte stream oriented ,TCP Medium “ flow ” A sequence of bytes that flows into or out of a process

User datagram protocol UDP Characteristics

(1) UDP It's disconnected

(2) UDP Use best efforts to deliver

(3) UDP It's message oriented

(4) UDP no congestion control

(5) UDP Support one-to-one 、 One to many 、 Many to one and many to one interactive communication

(6) UDP The cost of the first part is small , Only 8 Bytes , Than TCP Of 20 The first part of a byte is shorter