Which spanning Tree Protocol has been implemented on switch 2？ （）
- A、STP/IEEE 802.1D
- B、MSTP/IEEE 802.1s
- C、PVST+
- D、PVRST
- E、None of the other alternatives apply
正确答案:C
答案解析:有
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Which spanning Tree Protocol has been implemented on switch 2？ （）
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