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

Which two actions are performed by the Weighted Random Early Detection mechanism? (Choose two)
A . It drops lower-priority packets before it drops higher-priority packets
B. It can identify different flows with a high level of granularity
C. It guarantees the delivery of high-priority packets
D. It can mitigate congestion by preventing the queue from filling up
E. it supports protocol discovery

Answer: A,D

Explanation:

Weighted Random Early Detection (WRED) is just a congestion avoidance mechanism. WRED drops packets selectively based on IP precedence. Edge routers assign IP precedences to packets as they enter the network.

When a packet arrives, the following events occur:

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