What Is a VLAN?
Virtual LANs that segment networks for security and performance.
Definition
A VLAN divides one physical network into multiple logical networks. Devices in different VLANs cannot talk unless routed.
Diagram
VLAN 10 → PCs VLAN 20 → Servers VLAN 30 → IoT
Why It Matters
VLANs reduce attack surface, improve performance, and isolate insecure devices like IoT from critical systems.
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