3Com Switch 8800 Advanced Software V5 Configuration Guide

830 CHAPTER 60: QOS OVERVIEW
Among those traffic management technologies, traffic classification is the basis. It
is a prerequisite for differentiated services, which identifies the interested packets
with certain matching rule. As for traffic policing, traffic shaping, congestion
management and congestion avoidance, they implement management to
network traffic and allocated resources from different aspects respectively to
realize the differentiated service.
Normally, QoS provides the following functions:
■ Traffic classification
■ Access control
■ Traffic policing and shaping
■ Congestion management
■ Congestion avoidance