Reliable User Datagram Protocol

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In computer networking, the Reliable User Datagram Protocol (RUDP) is a transport layer protocol designed at Bell Labs for the Plan 9 operating system. It aims to provide a solution where UDP is too primitive because guaranteed-order packet delivery is desirable, but TCP adds too much complexity/overhead.

It extends UDP by adding the following additional features:

Acknowledgment of received packets
Windowing and congestion control
Retransmission of lost packets
Overbuffering (Faster than real-time streaming)

RUDP is not currently a formal standard, however it was described in an IETF internet-draft in 1999. It has not been proposed for standardization.

RFC 908 (Version 1)
RFC 1151 (Version 2)
Plan 9 implementation of RUDP
http://www.javvin.com/protocolRUDP.html
http://www3.ietf.org/proceedings/99mar/I-D/draft-ietf-sigtran-reliable-udp-00.txt

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Categories: Transport layer protocols | Internet protocols | Computer network stubs

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