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VLAN

A separate network sharing the same switches and Wi-Fi, kept apart by tags.

A VLAN (IEEE 802.1Q) tags frames so that devices on different VLANs share equipment but communicate only through a router, where firewall rules apply.

Examples

  • IoT VLAN 20, gh-devices, on 192.168.20.0/24 holds the bench nodes and the BLE gateway, sharing switches with the office network but kept apart by tags.

  • An access point can map the gh-devices SSID to VLAN 20, so Wi-Fi devices land on the IoT segment automatically.

See also

network segmentation deny by default blast radius
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