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多項(xiàng)選擇題

Which three characteristics of the traffic flow are taken into consideration when the QoS-for-VPNs feature (QoS pre-classify) provides packet classification and applies appropriate QoS service on tunnel interfaces?()

A.IP precedence bits
B.DSCP bits
C.original port numbers
D.DE bits
E.source IP address
F.destination IP address

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