Which of the following is not an essential prerequisite for AutoQoS to be correctly applied to aninterface？ （Choose all that apply.）（）
- AThe interface must be configured as a Multilink PPP interface
- BThe correct bandwidth should be configured on the interface
- CA QoS policy must not be currently attached to the interface
- DCEF must be enabled
- EAutoQoS must be enabled globally before it can be enabled on the interface
- FAn IP address must be configured on the interface if its speed is equal to or less than 768 k