Cisco® certifications enhance your career path by:

  • Validating achievements, knowledge and hands-on skill base.
  • Increasing professional credibility.
  • Diversifying and heightening skills, ensuring the ability to tackle the newest, cutting-edge technologies.

Quality of Service (642-642)

QoS is one of the papers of Cisco Certified Internetwork Professional (CCIP), and then Cisco Certified Voice Professional (CCVP). Current version of CCNP Voice (formerly CCVP) also includes the contents of QoS, but not as a separate paper.

This course gives you the knowledge and skills required to design, implement, and troubleshoot Quality of Service (QoS) on a network. The course addresses the essential QoS technologies and applications for both Service Provider and Enterprise networks.

After Completion:

You'll learn the following:

  • Implement different models and mechanisms used for ensuring QoS in a network
  • Implement QoS using MQC and AutoQoS
  • Classify and Mark network traffic to implement a policy according to QoS requirements
  • Use Cisco QoS queuing mechanisms to manage network congestion
  • Use Cisco QoS congestion avoidance mechanisms to reduce the effects of congestion on the network
  • Use Cisco QoS traffic policing and shaping mechanisms to effectively limit the network traffic
  • Use Cisco link efficiency mechanisms to improve the bandwidth efficiency of low speed WAN links
  • Select the most appropriate QoS mechanisms for providing QoS using Cisco best practices in service provider and enterprise networks


A Valid CCNA

QoS Contents:

  • Introduction to QoS
  • The Building Blocks of QoS
  • Introduction to Modular QoS CLI and AutoQoS
  • Classification and Marking
  • Congestion Management
  • Congestion Avoidance
  • Traffic Policing and Shaping
  • Link Efficiency Mechanisms
  • QoS Best Practices

The following are recommended to prepare QoS:

  • Cisco Press - IP Telephony Self-Study Cisco Qos Exam Certification Guide,Second Edition(2010)
  • Cisco Press - VoIP-QoS, 2002
  • Cisco QOS Exam Certification Guide, Second Ed.
  • VoIP - Cisco IP Telephony QoS design Guide

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