4A0-107 Exam - Question 13

WRED (Weighted Random Early Detection) operates by monitoring the shared buffer space utilization over time to prevent congestion by controlling packet loss probability dynamically (A). It uses two configurable slopes for each buffer pool: a high slope and a low slope, which helps in defining when and how packet drops should occur (C). Additionally, WRED uses the shared buffer utilization, instead of the individual queue depth, to get a better picture of the average resource utilization of the shared buffer space, thereby offering a holistic approach to managing buffer resources (D).