What Happens When a Switch Loop Crashes a Network?

In this episode of LAN Lab Guides, we explore Spanning Tree Protocol (STP) and why it's one of the most important technologies in modern networks. What happens when a network has multiple paths between switches? Without STP, a single redundant cable can create a switching loop, causing broadcast storms, MAC address table instability, and network outages. In this video, I demonstrate how these loops occur and how STP prevents them. Using both Cisco Packet Tracer and Cisco Modeling Labs (CML), we'll walk through: How switching loops are created Why broadcast storms occur Root Bridge election Root Ports, Designated Ports, and Alternate Ports How STP blocks redundant links Network redundancy and failover Whether you're studying for the CCNA, learning networking fundamentals, or working through a LAN Lab course, understanding STP is essential for designing reliable Layer 2 networks. Topics Covered: Spanning Tree Protocol (STP) Layer 2 Switching Broadcast Storms Network Redundancy Cisco Packet Tracer Cisco Modeling Labs (CML) CCNA Networking Concepts #CCNA #Networking #Cisco #PacketTracer #CML #SpanningTreeProtocol #STP #NetworkEngineering #LANLabGuides #CiscoNetworking