Which of the following characteristics describe the BPDU Guard feature？（Choose all that apply.）（）

• A、A BPDU Guard port should only be configured on ports with PortFast enabled
• B、BPDU Guard and PortFast should not be enabled on the same port.
• C、BPDU Guard is used to ensure that superior BPDUs are not received on a switch port
• D、A BPDU Guard port receiving a BPDU will go into err-disable state
• E、A BPDU Guard port receiving a BPDU will be disabled
• F、BPDU Guard can be enabled on any switch port