CCDE: Cisco Certified Design Expert (Practical) — Question 139

You are designing the QoS policy for a company that is running many TCP-based applications. The company is experiencing tail drops for these applications. The company wants to use a congestion avoidance technique for these applications. Which QoS strategy can be used to fulfill the requirement?

Answer options

• A. weighted fair queuing
• B. weighted random early detection
• C. first-in first-out
• D. low-latency queuing

Correct answer: B

Explanation

The correct answer is B, weighted random early detection, as it proactively drops packets before congestion occurs, thus preventing tail drops. Option A, weighted fair queuing, focuses on fair bandwidth distribution rather than congestion avoidance. Option C, first-in first-out, does not address congestion issues effectively, and option D, low-latency queuing, is designed for minimizing delays rather than managing congestion.