Introduction: Quality of Service Overview

This chapter explains quality of service (QoS) and the service models that embody it. It also suggests benefits you can gain from implementing Cisco IOS QoS in your network. Then it trains a closer focus on the Cisco Internetwork Operating System (IOS) QoS features and the technologies that implement them.

What Is QoS?

QoS refers to the ability of a network to provide better service to selected network traffic over various underlying technologies, including Frame Relay, Asynchronous Transfer Mode (ATM), Ethernet and 802.1 networks, SONET, and IP-routed networks. In particular, QoS features provide better and more predictable network service by

  • Supporting dedicated bandwidth

  • Improving loss characteristics

Get Cisco IOS™ 12.0 Quality of Service now with the O’Reilly learning platform.

O’Reilly members experience live online training, plus books, videos, and digital content from nearly 200 publishers.