Today's organizations are trying to cope up with exponential growth of personal mobile devices that try to access the enterprise network.

Network Access Controllers are responsible hardening the security of the enterprise network by controlling access of endpoints to the network resources and by enforcing security policies on each device. The overall objective of NAC Controller is to make better decision about which device get network access and what the device is allowed to do on the network. The NAC is also responsible for limiting or restricting endpoints to network resources based on the policies defined for the organization.
For More Details: https://www.wifi-soft.com/products/network-access-controllers.php