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單項(xiàng)選擇題

Which statement is true about the SDM QoS wizard and its ability to enable a QoS policy on router interfaces?()

A.QoS can be enabled on interfaces used for Easy VPN clients
B.QoS can be enabled on IPsec VPN interfaces and tunnels
C.QoS can be enabled on interfaces with an existing QoS policy
D.the QoS policy can be enabled for incoming and outgoing traffic on the interface

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