The Spanning Tree Protocol (STP) is a network protocolarrow-up-right that builds a loop-free logical topologyarrow-up-right for Ethernet networksarrow-up-right. The basic function of STP is to prevent bridge loopsarrow-up-right and the broadcast radiationarrow-up-right that results from them. Spanning tree also allows a network designarrow-up-right to include backup links to provide fault tolerancearrow-up-right if an active link fails.
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