单选题At which layer of the OSI model does the Spanning Tree Protocol （STP） operate at？（）ALayer 5BLayer 4CLayer 3DLayer 2ELayer 1
单选题
At which layer of the OSI model does the Spanning Tree Protocol （STP） operate at？（）
A
Layer 5
B
Layer 4
C
Layer 3
D
Layer 2
E
Layer 1
参考解析
解析：
暂无解析
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