!!! Overview
[{$pagename}] ([VLAN]) is any broadcast domain that is partitioned and isolated in a computer [network] at the [Data-link Layer] ([OSI-Model] layer 2) and is a [IEEE 802.1Q] [Standard]

[LAN] is the abbreviation for [Local Area Network] and in this [context] virtual refers to a physical object recreated and altered by additional logic. 

[{$pagename}]s work by applying "tags" to [network] packets and handling these tags in networking systems – creating the appearance and functionality of network traffic that is physically on a single network but acts as if it is split between separate networks. This allows VLANs can keep network applications separate despite being connected to the same physical network, and without requiring multiple sets of cabling and networking devices to be deployed.

!! More Information
There might be more information for this subject on one of the following:
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* [#1] - [Virtual_LAN|Wikipedia:Virtual_LAN|target='_blank'] - based on information obtained 2018-03-23-