Quality of Service in Network

Quality of Service is a control in the terms of bandwidth,delay,variance and the packet loss in the network service that is crucial for applications like Voice Over IP VOIP .

It provides the facility to prioritize the resource allocation in the network to ensure the right delivery of applications which are critical when its peak time for the resource sharing.

Need for QoS

There are two broad application areas that are driving the need for QoS in the network:

•  Mission-critical applications need QoS to ensure delivery and that their traffic is not impacted by misbehaving applications using the  network.

•  Real-time applications such as multimedia and voice need QoS to guarantee bandwidth and minimize delay. This ensures the stability   and reliability of existing applications when new applications are added.

QoS Benefits

QoS provides tremendous benefits. It allows network managers to understand and control which resources are being used by application, users, and departments.

It ensures the WAN is being used efficiently by the mission-critical applications and that other applications get “fair” service, but take a back seat to mission-critical traffic.

It also provides an infrastructure that delivers the service levels needed by new mission-critical applications, and lays the foundation for the “rich media” applications of today and tomorrow.