Define QoS and give an example of its use.

• A. QoS stands for Quality of Service and prioritizes certain traffic like voice and video to ensure performance.
• B. QoS is a security protocol that encrypts data to meet compliance.
• C. QoS is a method for fault tolerance by duplicating hardware.
• D. QoS is a network monitoring tool that logs events for auditing.

Answer: (A)