What Is QoS
Diversified services enrich users' lives but also increase the risk of traffic congestion on the Internet. In the case of traffic congestion, services can encounter long delays or even packet loss. As a result, services deteriorate or even become unavailable. Therefore, a solution to resolve traffic congestion on the IP network is urgently needed.
The best way to resolve traffic congestion is actually to increase network bandwidths. However, increasing network bandwidths is not practical in terms of operation and maintenance costs.
The quality of service (QoS) that uses a policy to manage traffic congestion at a low cost has been deployed. QoS aims to provide end-to-end service guarantees for differentiated services and has played an overwhelmingly important role on the Internet. Without QoS, service quality cannot be guaranteed.
