Which of the following statements describe the operation of WRED on the Nokia 7750 SR? (Choose three)

Which of the following statements describe the operation of WRED on the Nokia 7750 SR? (Choose three)
A . WRED monitors the shared buffer space utilization over a period of time.
B . WRED disables the TCP slow-start congestion control mechanism.
C . WRED uses two configurable slopes for each buffer pool: a high slope and a low slope.
D . 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.
E . WRED polices the shared buffer pool and marks all packets above a certain rate as "discard eligible."

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Answer: D