Quality of Service (QoS) is used to prioritize network traffic.

• A. True
• B. False
• C. Not sure
• D. Not applicable

Answer: (A)

Quality of Service (QoS) prioritizes network traffic to ensure that time‑sensitive or critical applications get the bandwidth and low latency they need. It works by identifying different types of traffic—such as voice, video, and regular data—and giving them different priorities or budgets. Network devices mark packets (for example with DSCP values or 802.1p tags), place them into appropriate queues, and schedule their transmission accordingly. This can include shaping and policing to control traffic flow and smooth bursts. The goal is to reduce latency and jitter for important traffic even when the network is congested. For instance, VoIP packets are prioritized over bulk file transfers, so calls stay clear and responsive during heavy activity. So, the statement is true: QoS is used to prioritize network traffic.