【多选题】
Which two statements are true about BPDU port-guard and BPDU filtering？（）
A、BPDU port-guard can be enabled globally， whereas BPDU filtering must be enabled on a per-interface basis.
B、When globally enabled， BPDU port-guard and BPDU filtering apply only to PortFast enabled ports.
C、When globally enabled， BPDU port-guard and BPDU filtering apply only to trunking-enabled ports.
D、When a BPDU is received on a BPDU port-guard enabled port， the interface goes into the err-disabled state.
E、When a BPDU is received on a BPDU filtering enabled port， the interface goes into the err-disabled state.
F、When a BPDU is received on a BPDU filtering enabled port， the interface goes into the STP blocking state.
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