The characteristics of udp are: 1. UDP is connectionless, that is, there is no need to establish a connection before sending data; 2. UDP uses best-effort delivery, that is, reliable delivery is not guaranteed; 3. UDP is message-oriented 4. UDP supports one-to-one, one-to-many, many-to-one and many-to-many interactive communications.
The main features of UDP
UDP is connectionless, that is There is no need to establish a connection before sending data (there is no connection to release when sending data ends), reducing overhead and delay before sending data.
UDP uses best-effort delivery, that is, no To ensure reliable delivery, the host does not need to maintain a complex connection state table
UDP is message-oriented. The sender's UDP will add a header to the message handed over by the application. Deliver the IP layer downwards. UDP neither merges nor splits the packets handed over by the application layer, but retains the boundaries of these packets
UDP does not have congestion control, and the congestion that occurs in the network will not Reduce the sending rate of the source host. This is important for some real-time applications
UDP supports one-to-one, one-to-many, many-to-one and many-to-many interactive communications
UDP’s header has a small overhead, only 8 bytes, which is shorter than TCP’s 20-byte header
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