單項(xiàng)選擇題

WhichtwostatementsaretrueaboutRED?()

A.REDrandomlydropspacketsbeforethequeuebecomesfull.B.REDisalwaysuseful,withoutdependencyonflow.C.REDincreasesthedroprateastheaveragequeuesizeincreases.D.REDhasaper-flowintelligence.
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