Performance. As mentioned above, routers that forward data in software become a bottleneck as LAN data rates increase. Doing away with the routers removes this bottleneck. -it is relatively easy to put all the people working together on a particular project all into a single VLAN. They can then more easily share files and resources with each other.  -f users move their desks, or just move around the place with their laptops, then, if the VLANs are set up the right way, they can plug their PC in at the new location, and still be within the same VLAN. This is much harder when a network is physically divided up by routers. -If there are servers or other equipment to which the network administrator wishes to limit access, then they can be put off into their own VLAN. Then users in other VLANs can be given access selectively   ... View more