Transport Layer - Freie Universität Berlin
Transport Layer - Freie Universität Berlin
Transport Layer - Freie Universität Berlin
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<strong>Transport</strong> Service Primitives<br />
● Processes on the application layer expect 100% reliable connections<br />
● They are not interested in acknowledgements, lost packets, congestions, …<br />
● <strong>Transport</strong> layer provides<br />
● Unreliable datagram service (Connectionless)<br />
● Reliable connection-oriented service<br />
● Three phases: establishment, communication, termination<br />
● The primitives for a simple connection-oriented transport service<br />
Primitive Packet sent Meaning<br />
LISTEN (none) Block until some process tries to connect<br />
CONNECT CONNECTION REQ. Activeley attempt to establish a connection<br />
SEND DATA Send information<br />
RECEIVE (none) Block until a DATA packet arrives<br />
DISCONNECT DISCONNECTION REQ. This side wants to release the connection<br />
Univ.-Prof. Dr.-Ing. Jochen H. Schiller ▪ cst.mi.fu-berlin.de ▪ Telematics ▪ Chapter 8: <strong>Transport</strong> <strong>Layer</strong><br />
8.7
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