What utilization range causes queues to turn Yellow?

• A. 0-25%
• B. 50-75%
• C. 75-100%
• D. 25-50%

Answer: (B)

Queues turn yellow when utilization is moderate, signaling a warning zone before reaching full congestion. In this scheme, using about half up to three-quarters of the configured maximum bandwidth means the queue is live and nearing its limit, so it’s shown as yellow to alert you to potential buildup if traffic spikes. Below that, green indicates normal low usage, and above that threshold (roughly three-quarters and higher) would typically be shown as red to indicate high congestion. So the yellow range corresponds to roughly 50% to 75% of the max, which is why the correct choice reflects that zone. If you see yellow, consider adjusting limits, adding more bandwidth, or tightening/reshaping traffic to prevent turning red.