Chapter 9. Differentiated Services

  1. H. Jonathan Chao Ph.D.1 and
  2. Xiaolei Guo Ph.D.2

Published Online: 12 FEB 2002

DOI: 10.1002/0471224391.ch9

Quality of Service Control in High-Speed Networks

Quality of Service Control in High-Speed Networks

How to Cite

Chao, H. J. and Guo, X. (2001) Differentiated Services, in Quality of Service Control in High-Speed Networks, John Wiley & Sons, Inc., New York, USA. doi: 10.1002/0471224391.ch9

Author Information

  1. 1

    Polytechnic University, Brooklyn, New York, USA

  2. 2

    INTEC Systems, Manalapan, New Jersey, USA

Publication History

  1. Published Online: 12 FEB 2002
  2. Published Print: 1 NOV 2001

ISBN Information

Print ISBN: 9780471003977

Online ISBN: 9780471224396



  • differentiated services (DS);
  • DS codepoint (DSCP);
  • per hop behavior (PHB);
  • behavior aggregate;
  • service level agreement (SLA);
  • traffic conditioning agreement (TCA);
  • traffic classification;
  • traffic conditioning;
  • implementation example;
  • conceptual model


Differentiated services (Diffserv or DS) is a set of technologies that allows network service providers to offer services with different kinds of network QoS objectives to different customers and their traffic streams. Chapter 9 describes the basic architecture of differentiated services, including the network boundary traffic conditioning and per hop behavior (PHB) functions. Some implementation examples are used to show how to support PHB in each network node. A conceptual model of the Diffserv router and its various components is also presented.