What is VLAN?
A VLAN (Virtual LAN) is a method for logically partitioning a physical network into multiple isolated segments using Layer 2 tagging (IEEE 802.1Q) – the primary tool for IT/OT network segmentation in facility environments.
Technical Definition: A method for logically partitioning a physical network into multiple isolated segments without additional hardware. VLANs use Layer 2 tagging (IEEE 802.1Q) to separate traffic between user groups or system types on the same physical switch infrastructure.
Why it matters: VLANs are the primary tool for OT network segmentation. By placing control systems, building automation and office IT in separate VLANs, you prevent problems and attacks in one segment from affecting others.
HubMind’s view: We design VLAN structures based on operational requirements and security needs. Clear segmentation between IT, OT and field device layers is the foundation of a secure and resilient building network.
Want to know more about VLAN?
HubMind helps you understand and apply VLAN in your facility.