单选题Which Cisco Catalyst feature automatically disables the port in an operational PortFast upon receipt of a BPDU?（）ABackboneFastBUplinkFastCRoot GuardDBPDU GuardEBPDU Filter
单选题
Which Cisco Catalyst feature automatically disables the port in an operational PortFast upon receipt of a BPDU?（）
A
BackboneFast
B
UplinkFast
C
Root Guard
D
BPDU Guard
E
BPDU Filter
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