Which four Cisco priority Spanning Tree Protocol enhancements are supported with rapid per-VLAN Spanning Tree？ （）
- A、 PortFast
- B、 UplinkFast
- C、 loop guard
- D、 root guard
- E、 BPDU guard
- F、 BackboneFast
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Which four Cisco priority Spanning Tree Protocol enhancements are supported with rapid per-VLAN Spanning Tree？ （）
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