The transport layer is the layer of a network protocol stack that provides communication services between applications running on different hosts. Depending on the protocol, those services can include connection-oriented communication, reliable and ordered delivery, flow control, congestion control and the multiplexing of many application conversations over one connection to the network by means of ports. It appears in both the Internet protocol suite and the OSI model, where it is Layer 4, although the functions assigned to it differ between the two architectures. The principal transport protocols of the Internet are the Transmission Control Protocol, which offers a reliable byte stream, and the User Datagram Protocol, which offers a connectionless datagram service with fewer guarantees; newer protocols such as QUIC are built on top of UDP.
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1. Transport layer (Wikipedia)
Lead, abstraction level
an abstraction layer in a network protocol stack that provides communication services between applications
In Field: Computer Networking, Lead
In computer networking, the transport layer is an abstraction layer in a network protocol stack
In Group: System Architecture and Data Models, Lead, layer in a protocol architecture
The transport layer is defined in both the Internet protocol suite and the OSI model
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