Which statement describes the purpose of Quality of Service in networks?

Which statement describes the purpose of Quality of Service in networks?

• A. Prioritize critical traffic to improve performance
• B. Encrypt all data by default
• C. Map IP addresses to MAC addresses
• D. Determine device IP assignments

Answer: (A)

Quality of Service is about controlling how network resources are shared so that time‑sensitive traffic gets priority. By classifying different kinds of traffic, marking packets, and using queuing and shaping methods, a network can ensure that critical applications—like voice and video—experience lower latency and less jitter even when the link is congested. In other words, QoS is designed to improve the performance of important traffic by giving it preferential treatment. Encrypting all data by default is a security function, not QoS. Mapping IP addresses to MAC addresses is what ARP does, a process for local address resolution. Determining device IP assignments is related to IP addressing management or DHCP.

Quality of Service is about controlling how network resources are shared so that time‑sensitive traffic gets priority. By classifying different kinds of traffic, marking packets, and using queuing and shaping methods, a network can ensure that critical applications—like voice and video—experience lower latency and less jitter even when the link is congested. In other words, QoS is designed to improve the performance of important traffic by giving it preferential treatment.

Encrypting all data by default is a security function, not QoS. Mapping IP addresses to MAC addresses is what ARP does, a process for local address resolution. Determining device IP assignments is related to IP addressing management or DHCP.