What is QoS/CoS?

Quality of Service (QoS) and Class of Service (CoS) are mechanisms used to manage network traffic and prioritize certain types of data over others. QoS encompasses a broader range of techniques to guarantee a certain level of performance, whereas CoS focuses specifically on classifying traffic into different categories and applying different treatments based on that classification. They are commonly used to ensure that latency-sensitive applications like VoIP and video conferencing receive preferential treatment over less time-critical traffic like email or file downloads, thereby improving overall network performance and user experience.