单选题You are experiencing contention in the queue on an egress interface of the router. Which policy action should be used for congestion control?（）AmarkBcolorCfilterDdiscard
单选题
You are experiencing contention in the queue on an egress interface of the router. Which policy action should be used for congestion control?（）
A
mark
B
color
C
filter
D
discard
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