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多项选择题When should traffic shaping be implemented on Frame Relay PVCs?()

A、When you want to drop excess traffic above the CIR

B、When there is a speed mismatch between the central site and the remote site

C、When using Frame Relay SVCs

D、When over-subscribing the central site link

E、When LLQ is implemented on the Frame Relay PVC

F、When Multilink PPP LFI is implemented on the Frame Relay PVC

  • B,D
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