Use QoS to prioritize and adjust quality aspects of
network traffic. You can assign the order in which packets are handled
and allot bandwidth, ensuring preferred treatment and optimal levels
of performance are afforded to selected traffic, applications, and
users.
Service quality measurements subject to a QoS implementation
are bandwidth (maximum rate of transfer), throughput (actual rate
of transfer), latency (delay), and jitter (variance in latency).
The capability to shape and control these service quality measurements
makes QoS of particular importance to high-bandwidth, real-time
traffic such as voice over IP (VoIP), video conferencing, and video-on-demand
that has a high sensitivity to latency and jitter. Additionally,
use QoS to achieve outcomes such as the following: