Transport Layer - Freie Universität Berlin
Transport Layer - Freie Universität Berlin
Transport Layer - Freie Universität Berlin
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Summary<br />
● The classical TCP/IP reference model has only two protocols on the transport<br />
layer<br />
● UDP for connectionless, unreliable, but lightweight protocol<br />
● TCP for connection oriented and reliable communication, but really complex<br />
● Connection establishment<br />
● Flow control / congestion control<br />
● Connection termination<br />
● Fairness<br />
● New applications motivate new transport layer protocols<br />
● SCTP initially for transporting signaling messages offers multi-stream/multi-home<br />
● DCCP offers unreliable datagram service, but with congestion avoidance<br />
● Man more protocols exist – but will they be used?<br />
● MPTCP (Multipath TCP), RUDP (Reliable UDP), UDP Lite, …<br />
● See http://www.iana.org/assignments/protocol-numbers/protocol-numbers.xml for<br />
some more as IPv4 (protocol) and IPv6 (next header) point also to layer 4 protocols<br />
Univ.-Prof. Dr.-Ing. Jochen H. Schiller ▪ cst.mi.fu-berlin.de ▪ Telematics ▪ Chapter 8: <strong>Transport</strong> <strong>Layer</strong><br />
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