一名網絡工程師正在一臺 CPE 設備上實施出站管理流量分類和標記的 QoS 策略,該策略有以下要求:管理協議必須標記爲 DSCP AF 類別 2,且丟包概率低。監控協議必須標記爲 DSCP AF 類別 1,並降低丟棄概率。所有其餘流量必須標記爲 DSCP 值 0。
A. olicy-map cpe-mgmt-policy class management set ip dscp af21 class monitoring set ip dscp af11 class-default set ip dscp default end
B. olicy-map cpe-mgmt-policy class management set ip dscp af21 class monitoring set ip dscp af11 class-default set ip dscp af0 end
C. olicy-map cpe-mgmt-policy class management set ip dscp af23 class monitoring set ip dscp af13 class-default set ip dscp default end
D. olicy-map cpe-mgmt-policy class management set ip dscp af23 class monitoring set ip dscp af13 class-default set ip dscp af0 end