Refer to the exhibit. What is the problem with this configuration？（） 
- A、 Spanning tree PortFast cannot be configured on a port where a voice VLAN is configured.
- B、 Sticky secure MAC addresses cannot be used on a port when a voice VLAN is configured.
- C、 Spanning tree PortFast cannot be configured on a port when a sticky secure MAC address is used.
- D、 The switch port must be configured as a trunk.
正确答案:B
答案解析:有
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