单选题Which statement correctly describes enabling BPDU guard on an access port that is also enabled for PortFast？（）AUpon startup， the port transmits 10 BPDUs. If the port receives a BPDU， PortFast and BPDU guard are disabled on that port and it assumes normal STP operation.BThe access port ignores any received BPDU.CIf the port receives a BPDU， it is placed into the error-disable state.DBPDU guard is only configured globally and the BPDU filter is required for port-level configuration.
单选题
Which statement correctly describes enabling BPDU guard on an access port that is also enabled for PortFast？（）
A
Upon startup， the port transmits 10 BPDUs. If the port receives a BPDU， PortFast and BPDU guard are disabled on that port and it assumes normal STP operation.
B
The access port ignores any received BPDU.
C
If the port receives a BPDU， it is placed into the error-disable state.
D
BPDU guard is only configured globally and the BPDU filter is required for port-level configuration.
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