Qos - EnGenius EWS Series User Manual

QoS

Quality of Service (QoS) provides the ability to implement priority queuing within a network. QoS is a
means of providing consistent and predictable data delivery to the Switch by distinguishing between
packets that have stricter timing requirements from those that are more tolerant of delays. QoS enables
traffic to be prioritized while avoiding excessive broadcast and multicast traffic. Traffic such as Voice and
Video streaming which require minimal delays can be assigned to a high priority queue, while other
traffic can be assigned to a lower priority queue, resulting in uninterrupted actions. Without QoS, all
traffic data is as likely to be dropped when the network is congested. This can result in reductions in
network performance and hinder the network in time-critical situations.
In a Switch, multiple queues per port are often provided to give preference to certain packets over
others based on user-defined criteria. When a packet is queued for transmission within a port, the rate
at which it is processed depends on how the queue is configured and the amount of traffic present
within other queues on the port. If a delay is necessary, packets are held in the queue until they are
authorized for transmission.
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