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

Which of the following statements describe the operation of WRED on the Alcatel-Lucent 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