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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. A computer network is a system for communication among two or more computers. ... In computing and telecommunications, the transport layer is layer four of the seven layer OSI model. ... The word protocol derives from a Greek phrase meaning first leaf, referring to the first draft of a treaty. ... This article needs to be cleaned up to conform to a higher standard of quality. ... Plan 9 may refer to: The science-fiction movie Plan 9 from Outer Space by Ed Wood. ... In computing, an operating system (OS) is the system software responsible for the direct control and management of hardware and basic system operations. ... The User Datagram Protocol (UDP) is one of the core protocols of the Internet protocol suite. ... A packet is the fundamental unit of information carriage in all modern computer networks. ... Jump to: navigation, search The Transmission Control Protocol (TCP) is one of the core protocols of the Internet protocol suite. ...