В чем особенность протоколов UDP?

UDP (User Datagram Protocol) is a transport layer protocol focused on transmitting data without establishing a connection.

Features of UDP:

• Connectionless: No "handshake" occurs before data transmission, unlike TCP. This reduces latency and overhead.
• Unreliable: UDP does not guarantee packet delivery, order, or the absence of duplicates. If a packet is lost, it is not retransmitted by the protocol.
• High speed: Due to the lack of error control, flow control, and retransmission mechanisms, UDP provides higher data transfer speeds compared to TCP.
• Small header: UDP header is minimal (8 bytes) compared to TCP header (at least 20 bytes), reducing the amount of data transmitted.
• No flow or congestion control: UDP does not have built-in mechanisms for managing data transfer rate or responding to network congestion.

Using UDP is appropriate in applications where minimal delay is crucial, and data loss is acceptable or can be handled at the application level (e.g., streaming video, online games, VoIP, DNS services).