Network Access Control (NAC) systems monitor the network and check any device that tries to connect for specific parameters, such as an up-to-date anti-virus client, patch levels, particular applications such as encryption or VPN apps, and settings such as ensuring that passwords are properly complex. NAC systems help secure the network by ensuring that devices that are insecure or may have malware loaded, or that don't properly encrypt data, cannot connect to the network.
5. Create a Policy Server
Each of the major operating systems, such as Android and iOS, can be used with a policy and management server such as System Center Configuration Manager or SELinux Policy Server. These servers allow you to access mobile devices remotely, wipe them if they are stolen, install necessary applications anti-virus clients, load patches to the OS or applications, and ensure that any data copied to the device is properly encrypted.