Socket programming 2: two link types: UPD and UPD

In the previous article, I talked about some basic knowledge about computer networks and introduced socket. From this section, I started to get started.

1 Probability

TCP:Transimission Control Protocol Transmission Control Protocol.

UPD: User datav protocol user data packet protocol.

Both belong to the transport layer protocol, the fourth layer in the OSI model described in the previous article.

Comparison:

2. TCP is connection-oriented, and UDP is non-connection-oriented)
4. Slow TCP transmission speed and fast UDP transmission speed)
6. TCP has a packet loss retransmission mechanism, but UDP does not; (Retransmission)
8. TCP ensures data correctness and UDP may cause packet loss (correctness)
10. TCP is suitable for transmitting a large amount of data, and UPD is suitable for transmitting a small amount of data. (Data volume)

2. TCP link Process

3. UDP Link

* Both images are from the network.

Socket programming

Socket is an API for TCP/IP networks. programmers use socket interfaces to exchange data.