Which of the following is the drop probability of packets exceeding the upper threshold in WRED?
0.2
0.5
1
0.8
WRED (Weighted Random Early Detection) helps prevent congestion by randomly discarding packets before buffers are full.
Drop Probability Behavior:
Below lower threshold = 0% drop (packets pass normally).
Between lower & upper threshold = Progressively increasing drop probability.
Above upper threshold = 100% drop (probability = 1).
✅ Reference: Huawei HCIE-Datacom Guide - WRED Mechanism
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