QoS allows you to define the priority traffic on the network.

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

Answer: (A)

Quality of Service is about ensuring time‑sensitive traffic gets the bandwidth and low latency it needs. By using QoS, you classify traffic (by application such as VoIP or video, or by markings like DSCP) and assign it to priority levels or specific queues. Routers and switches then treat high‑priority traffic first, limit or shape less critical traffic, and often reserve bandwidth for key streams. This helps reduce latency and jitter and prevents packet loss for critical services during congestion. So, QoS indeed lets you define which traffic has priority on the network.