Transport Layer - Freie Universität Berlin
Transport Layer - Freie Universität Berlin
Transport Layer - Freie Universität Berlin
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DCCP vs. TCP/UDP<br />
● Choice of congestion control mechanisms, even different per halfconnection<br />
(eg TCP-like, TCP-friendly Rate Control etc.)<br />
● Feature negotiation mechanism<br />
● Per packet sequence numbers<br />
● Different ACK formats (Still: no reliability! Up to the app to decide!)<br />
● DoS protection (e.g. cookies against flooding)<br />
● Distinguishing of different kinds of loss<br />
● Corruption, receiver buffer overflow…<br />
● No receive window, simultaneous open, half-closed states…<br />
● …<br />
● Very roughly<br />
● DCCP = TCP – bytestream semantics - reliability<br />
● DCCP = UDP + congestion control + handshake + acknowledgements<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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