ProSoundWeb: VLAN stands for virtual local area network. VLANs operate at Layer 2 on the OSI model (again, Part 2) and are a way of creating mostly isolated networks on a single set of physical cabling and switches. I say “mostly” because the traffic is isolated, but the VLANs share the same pool of bandwidth available on the switch, uplink interfaces, etcetera.
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Networking systems can become incredibly critical in a production environment, and that only becomes more apparent the larger the system becomes. Something about networking that I've always been intrigued by is the ability to organize data so people cannot 'accidentally' interfere in other parts of the network. Often this can be accomplished using subnetting, but in this case we are taking that separation to a whole new level. VLANs would allow us to have single patch panels (in reality they would be switches) at the front and back of the house that could independently carry lighting, audio, projections, and even automation LANs, without unintended interference (it is worth noting that the bandwidth or overall data transmission capabilities of CAT6 cable is limited). It is certainly a neat idea that is worth looking into, however we often don't run into situations where dozens of network cables need to be run for a show. Nevertheless, it is a cool tool to have in the pocket of an integrator.
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