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Transport protocols

Transport protocols. Speaker : Sally Date:2012/07/26. Protocol Stack. (Open Systems Interconnection). Process to Process C ommunication. Processes : Running application programs. Network layer versus transport layer. Addressing: Port numbers. IP addresses versus Port numbers .

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Transport protocols

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  1. Transport protocols Speaker : Sally Date:2012/07/26

  2. Protocol Stack (Open Systems Interconnection) The TCP/IP Guide : http://www.tcpipguide.com/free/t_TCPIPArchitectureandtheTCPIPModel-2.htm

  3. Process to Process Communication Processes : Running application programs Network layer versus transport layer TCP/IP Protocol Suite (Behrouz A. Forouzan)

  4. Addressing: Port numbers TCP/IP Protocol Suite (Behrouz A. Forouzan)

  5. IP addresses versus Port numbers TCP/IP Protocol Suite (Behrouz A. Forouzan)

  6. Socket address • Local Host (IP address) • Local Process (port number) • Remote Host • Remote Process TCP/IP Protocol Suite (Behrouz A. Forouzan)

  7. Question: • The port numbers are divided into three ranges. Please explain these three ranges and which range is chosen as ephemeral port numbers for clients? • the word ephemeral means short lived. • Which port number is used by Nameserver? TCP/IP Protocol Suite (Behrouz A. Forouzan)

  8. Encapsulation and Decapsulation TCP/IP Protocol Suite (Behrouz A. Forouzan)

  9. Multiplexing and Demultiplexing (one to many) (many to one) TCP/IP Protocol Suite (Behrouz A. Forouzan)

  10. Flow/Error/Congestion Control • Flow Control • To prevent the overflow of buffers in communicating end-points • Error Control • Error detection. (loss or corrupted data) • Congestion Control • To prevent the overflow of buffers in the routers TCP/IP Protocol Suite (Behrouz A. Forouzan)

  11. Connectionless service TCP/IP Protocol Suite (Behrouz A. Forouzan)

  12. Connection-oriented service TCP/IP Protocol Suite (Behrouz A. Forouzan)

  13. Transport protocols • UDP • User Datagram Protocol • TCP • Transmission Control Protocol • SCTP • Stream Control Transmission Protocol • DCCP • Datagram Congestion Control Protocol

  14. Socket programming + Wireshark Question ? Yuan-Cheng Lai, “DCCP: Transport Protocol with Congestion Control and Unreliability”, IEEE Internet Computing, Vol 12, No 5, Sep/Oct 2008, pages 78 - 83.

  15. SCTP: Multi-streaming and Multi-homing S. Fu and M. Atiquzzaman, “SCTP: state of the art in research, products, and technical challenges”, IEEE Communications Magazine, Volume 42, Issue 4, April 2004, Pages 64-76.

  16. DCCP • DCCP • Combines unreliable transmission (meeting real time application needs) and various congestion controlmechanisms (ensuring fairness in the Internet) • Two basic functions: • Establish, maintain & teardown unreliable connections • Impose congestion control on unreliable connections NWEN402-Internet Engineering-New Transport-Protocols (Prof. Winston)

  17. Q & A

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