What does Quality of Service (QoS) primarily focus on in a network?

Quality of Service (QoS) primarily focuses on prioritizing network traffic to ensure optimal performance for different types of data transmissions. This means that QoS techniques are used to manage network resources by determining which types of traffic should be prioritized over others, thereby improving the overall user experience, especially in scenarios where bandwidth is limited or variable.

For instance, in a network where both video streaming and regular web browsing are happening, QoS can prioritize video traffic to minimize buffering and ensure smooth playback, while allocating less priority to non-urgent data like emails or file downloads. This prioritization helps ensure that critical applications receive the necessary bandwidth and latency requirements, enhancing their performance under varying network conditions.

This focus on traffic prioritization is central to QoS, as it directly influences the quality of the service delivered to users, making it essential for applications that require consistent performance, such as VoIP, video conferencing, and live streaming. The other options presented are not the primary focus of QoS, which distinguishes it as a vital component in network management and optimization strategies.