STP
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May 1, 2024
Updated May 11, 2025
33 minute read
Spanning Tree Protocol (STP) is a fundamental network protocol designed to prevent a common and disruptive problem in Ethernet networks: broadcast storms caused by switching loops. In essence, STP creates a loop-free logical topology by intelligently blocking redundant paths in a network. This ensures that there is only one active path between any two network devices, preventing data packets from endlessly circulating and overwhelming the network. While its primary function is loop prevention, STP also provides a degree of fault tolerance by allowing these redundant links to become active if a primary link fails.
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