CCNA: Cisco Certified Network Associate — Question 35

Which two actions are performed by the Weighted Random Early Detection mechanism? (Choose two.)

Answer options

• A. It supports protocol discovery.
• B. It guarantees the delivery of high-priority packets.
• C. It can identify different flows with a high level of granularity.
• D. It can mitigate congestion by preventing the queue from filling up.
• E. It drops lower-priority packets before it drops higher-priority packets.

Correct answer: D, E

Explanation

The correct answers, D and E, highlight how Weighted Random Early Detection helps manage congestion by preventing queues from overflowing and prioritizing packet drops. Options A and B are incorrect as WRED does not focus on protocol discovery or guarantee delivery for high-priority packets specifically. Option C, while related to flow identification, is not a primary function of WRED.