What aspect of network service does QoS address?

Quality of Service (QoS) specifically addresses the need to prioritize different types of network traffic. This capability allows network administrators to allocate resources based on the importance or sensitivity of the data being transmitted. For instance, real-time communication applications like VoIP or video conferencing require a higher priority to function optimally, as they are more sensitive to delays and packet loss compared to less time-critical data transfers.

By implementing QoS, networks can ensure that essential applications receive the necessary bandwidth and lower latency, while less critical services are relegated to lower priorities. This traffic differentiation helps maintain performance, particularly in environments where network congestion may otherwise degrade service levels.