Everything that happens at Layer 2 inside a building.
Walk through how a switch builds its MAC table, how 802.1Q tags carry many VLANs over a single trunk, why Spanning-Tree exists, how EtherChannel bundles links, and how 802.11 wireless fits into the wired LAN.
Welcome to module 3. Everything that happens at Layer 2 inside a building. I'll meet you again at the top of every chapter — this module's course coverage is 18%, so don't rush it. Pick chapter 3.1 below to start.
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