單項(xiàng)選擇題在QoS部署方案中,對(duì)電路域業(yè)務(wù)若CE-PE電路域和分組域共用接口,為電路域業(yè)務(wù)流量預(yù)留()帶寬

A.40%
B.50%
C.60%
D.70%


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