11.1 | TCP/IP Transport Layer | |||
11.1.8 | User Datagram Protocol (UDP) |
User Datagram Protocol (UDP) is the
connectionless transport protocol in the TCP/IP protocol stack. UDP is
a simple protocol that exchanges datagrams, without acknowledgments or
guaranteed delivery. Error processing and retransmission must be
handled by higher layer protocols.
UDP uses no windowing or acknowledgments so reliability, if needed, is provided by application layer protocols. UDP is designed for applications that do not need to put sequences of segments together. The protocols that use UDP include:
The following are the definitions of the fields in the UDP segment:
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