As a result, VLANs contain at least one subnet, and can support multiple subnets. However, virtual LANs are able to break up broadcast domains without needing to connect back to a router, taking some of the management burdens off of the router.īecause VLANs are their own virtual networks, they have to behave somewhat like they have a built-in router. Virtual LANs emulate hardware acting as ndividual switches.
The data link level is closer to the hardware and less abstract. VLANs find their home on Layer 2 of the OSI Model. The main difference between virtual servers and virtual LANs is that virtual LANs can be distributed across multiple physical pieces of hardware with a designated cable called a trunk. One or more managed switches run the software (similar to hypervisor software) that allows the switches to create multiple virtual switches within one physical network.Įach virtual switch is its own self-contained network. Virtual LANs work in much the same way as virtual servers. Through virtualization, you are able to effectively turn a single physical computer into multiple virtual computers each available for separate tasks and users.
Multiple virtual servers reside within one physical piece of hardware that’s running an operating system and hypervisor to create and run the virtual servers on the single physical server. Think for a second how virtual machines work. Okay, so you know the acronym, but what exactly is a VLAN? The basic concept should be familiar to anyone who has worked with or used virtual servers.
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