A VLAN is a virtual neighborhood inside your network — a logical grouping of devices that behaves like its own private LAN even if the machines are scattered across different switches. Instead of every broadcast hitting every device, a VLAN slices the network into clean, isolated broadcast domains. The result is order, performance, and security inside what would otherwise be one noisy digital city.

In this episode, we explore:

• What a VLAN actually is and why it exists

• How switches tag and separate traffic

• VLAN ID ranges and how they’re assigned

• Port-based, protocol-based, and MAC-based VLANs

• How VLANs reduce broadcast storms

• LAN vs VLAN — the big conceptual differences

• Security benefits and common drawbacks

• Real-world examples of isolation and segmentation

• When and why companies deploy VLANs at scale

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