User Datagram Protocol is a 'connectionless' protocol which uses IP (Internet Protocol) to send datagrams in a similar way to TCP. Unlike TCP, UDP does not care if the packets reach their destination. UDP is mostly used in 'streaming' or real-time applications where a measure of data loss is acceptable.
Internet User Datagram Protocol. An Internet protocol adding port numbering to IP for applications which need a connectionless datagram service, as distinct from the connection-oriented virtual circuit protocol, TCP.
User Datagram Protocol - an alternative to TCP, used in cases where reliability is considered unimportant, or where a connection-oriented dialogue is not required - each datagram is fired into the network as a single IP packet, and if it gets lost before reaching its destination, then tough luck
Found on http://www.archivemag.co.uk/
One of the protocols for data transfer that is part of the TCP/IP suite of protocols. UDP is a 'stateless' protocol in that UDP makes no provision for acknowledgement of packets received. Found on http://www.matisse.net/files/glossary.html