What is QoS?
In a general context, quality of service is a set of methods and processes a service-based organization implements to maintain a specific level of quality. In the context of networking, Quality of Service (QoS) refers to a combination of mechanisms that cooperatively provide a specific quality level to application traffic crossing a network or multiple, disparate networks. Implementing QoS means combining a set of IETF-defined technologies designed to alleviate the problems caused by shared network resources and finite bandwidth. QoS provides two distinct benefits: • A mechanism for applications to request service quality parameters, such as low network delay. • Higher levels of administrative control over congested subnet bandwidth resources. Implementing QoS enables administrators to make the most efficient use of subnet bandwidth when deploying resource-intensive applications. A QoS-enabled network provides guarantees for sufficient resources, giving a congested, shared network segm
