Quality Of Service In IP-Based Mission Critical Networks

Course Length:



This two-day seminar describes methods and techniques for providing differentiated and guaranteed services within IP-based enterprise networks. These techniques provide the bandwidth, packet delay, packet loss, response time and availability guarantees required for transmitting voice, data and video services over a converged network. The seminar describes metrics used to define quality of service (QoS), and tools such as Diffserv, Intserv and MPLS, which can be used to guarantee QoS to customers. The seminar will discuss the impact of encryption on QoS, and how to provide QoS in multi-domain networks such as the Global Information Grid (GIG). The seminar will include analytical models which can be used to predict and compare performance for various QoS mechanisms. The seminar is particularly useful for organizations that are planning to transmit critical applications on wireless and satellite networks, where bandwidth is constrained and links are susceptible to packet loss.

Who should attend:

Technical staff involved with the use of Internet technology in mission-critical networks, with strong requirements for quality of service. Basic knowledge of IP-based packet switched networks required.

Course Objectives:

  • Understand the performance metrics used to define QoS in mission critical networks
  • Learn how performance metrics differ for elastic and inelastic applications
  • Learn how routers process and drop packets and how this affects QoS
  • Learn how RSVP, MPLS, DiffServ are used to provide QoS
  • Understand the differences between admission control techniques used for voice and video transmissions
  • Learn about products and techniques that can reduce bandwidth demands in networks with constrained links
  • Understand the impact of military Precedence and Preemption requirements on QoS
  • Understand the impact of mission importance on QoS
  • Identify the issues involved in establishing QoS in multi-provider environments
  • Identify the issues involved in establishing QoS within mobile networks
  • Understand the role of network management and Service Level Agreements (SLA) in supporting QoS requirements
  • Introduce students to the use of simplified analytical models to estimate call blocking probability, packet delays and response time in converged networks


Course Outline:

  1. Introduction and Purpose – including a definition of QoS
  2. A Quick Review of Internet Protocols – how these protocols affect QoS
  3. Quality of Service Issues for IP-based Applications – differences between voice, video and data services
  4. Provision of Differentiated and Guaranteed Services: Data and Control Planes – admission control, packet marking and forwarding, IntServ, DiffServ, MPLS
  5. Management Plane Issues – provisioning, network management, security issues
  6. Multi-Provider Issues – Service Level Agreements, impact of needing the support of multiple service providers
  7. Analysis Techniques – explanation of how basic queuing theory can be used to predict performance in QoS enabled networks
  8. Quantitative Examples – examples of networks with constrained links
  9. Concluding Remarks


REGISTRATION:  There is no obligation or payment required to enter the Registration for an actively scheduled course.   We understand that you may need approvals but please register as early as possible or contact us so we know of your interest in this course offering.

SCHEDULING:  If this course is not on the current schedule of open enrollment courses and you are interested in attending this or another course as an open enrollment, please contact us at (410)956-8805 or ati@aticourses.com. Please indicate the course name, number of students who wish to participate. and a preferred time frame. ATI typically schedules open enrollment courses with a 3-5 month lead-time.   To express your interest in an open enrollment course not on our current schedule, please email us at ati@aticourses.com.

For on-site pricing, you can use the request an on-site quote form, call us at (410)956-8805, or email us at ati@aticourses.com.


  • Burt H. Liebowitz is Principal Network Engineer at the MITRE Corporation, McLean, Virginia. He has more than 30 years experience in computer networking. His current assignment at MITRE includes the development of performance models of mission critical IP-based networks. Prior to MITRE he was President of NetSat Express Inc., a provider of Internet and Intranet services over satellite. Before that he was Chief Technical Officer for Loral Orion responsible for Internet-over-satellite access products. Mr. Liebowitz has authored two books on distributed processing and numerous articles on computing and communications systems. He has presented courses at the MITRE Institute and has lectured extensively on computer networking. He holds three patents for satellite-based data networking systems. Mr. Liebowitz has I.E. and M.S. in Mathematics degrees from Rensselaer Polytechnic Institute, and an MSEE from Polytechnic Institute of Brooklyn.

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