A VLAN (Virtual Local Area Network) is an isolated network within an isolated network that only allows specific kinds of network traffic.  For example, If you live in a community with roads, think of those roads as a network.  They allow vehicles to travel from place to place, the same way that data does on a data network.  Now, put a gated community within that community that only allows golf carts to travel within it.  That's a VLAN. ... View more