O'Reilly logo

CCIE Routing and Switching Exam Quick Reference Sheets by Anthony Sequeira

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 5. Quality of Service (QoS)

Introduction

Voice, video, and data travel side by side over today's converged networks. Some of these traffic types (for example, VoIP) need better treatment (that is, higher priority) than other types of traffic (for example, FTP). Fortunately, Cisco offers a suite of QoS tools for providing special treatment for special traffic.

In the absence of QoS, traffic might suffer from one or more of the following symptoms:

  • Delay (latency)—Excessive time required for a packet to traverse the network
  • Delay variation (jitter)—The uneven arrival of packets, which in the case of VoIP can be interpreted by the listener as dropped voice packets
  • Packet loss—Dropping packets, especially problematic for User Datagram Protocol ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required