5.6. Quality of Service
Quality of Service (QoS) refers to the control of network traffic so that an application, client, or user can expect a certain level of performance. It arises out of the telephone industry as part of the X.902 standard and has been applied to packet-switched networks such as TCP/IP.
A QoS network manager will measure:
Available network bandwidth
Application usage by examining packets and protocols used
Traffic source and destination
Port usage
and from these measurements allow the application of a set of policy rules that control network usage. QoS doesn't guarantee a high level of performance; what QoS refers to is the assurance of a certain level of guaranteed service. Applications that benefit from QoS policies include ...
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