Quality of Service (QoS) is a technology that can guarantee that traffic is passed at specified values.
QoS is used to assign different priorities to different types of traffic, applications or users on the network. This allows for better management of network resources and ensures that critical applications get the bandwidth and performance they need. This is especially important when transmitting traffic with special requirements, such as voice and video applications. In these cases, QoS mechanisms are used to guarantee a certain level of performance, such as low latency and high throughput, to ensure a satisfactory user experience.
QoS describes the level of performance and prioritization of serving different types of traffic in a telecommunications network. It refers to the mechanisms used to ensure that traffic is delivered with the required, rather than actually achieved, level of performance.
To measure QoS, data rates, throughput, latency in transmission, lost packets, availability, and jitter are evaluated. These metrics are used to quantify the quality of service provided by the network.