M5 - Spanning Tree Protocol - STP - Cisco CCNA Routing & Switching скачать в хорошем качестве

M5 - Spanning Tree Protocol - STP - Cisco CCNA Routing & Switching

Learn how the Spanning Tree Protocol (STP) keeps networks stable by preventing Layer 2 loops and broadcast storms. In this video, we explore why redundancy can create serious problems in switched networks and how STP solves them. You’ll see how physical backup paths can lead to logical loops, why Ethernet frames without a time-to-live can circulate endlessly, and how broadcast storms can quickly overwhelm a network. From there, we break down the core STP process, including root bridge election, port roles, and how switches determine the lowest-cost path through the network. The video also compares legacy STP (802.1D) with Rapid Spanning Tree (802.1w), highlighting the major improvement from 30–50 second convergence times to sub-second recovery. Ideal for CCNA preparation, classroom instruction, or lab study, this lesson gives you a clear understanding of loop-free redundancy in Layer 2 networks.