Certified - CompTIA Network + Audio Course
Episode 113: Spanning Tree Protocol — Loop Prevention for Switches
20 Jul 2025
Spanning Tree Protocol (STP) is critical for preventing Layer 2 loops that can crash entire networks. In this episode, we explain how STP operates by detecting redundant paths and placing specific ports in a blocking state. You'll learn about key concepts like the root bridge, bridge ID, port roles (root, designated, and blocked), and the election process that determines which paths remain active.We also cover Rapid STP (RSTP) and its faster convergence benefits, as well as configuration best practices and how to interpret STP behavior using switch logs and CLI commands. Misconfigured or disabled STP can lead to broadcast storms, MAC table instability, and massive outages—making this protocol essential knowledge for any network technician. Whether in an exam scenario or real-world network deployment, STP is a topic you can't afford to ignore.
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