imRAD®[1] provides the RADIUS(Remote Authentication Dial In User Service) and DHCPv4/6 server services. RADIUS provides centralized Authentication, Authorization, and Accounting management for users who connect and use a network service and it is the back-end of choice for 802.1X authentication as well[2].
WPA(Wi-Fi Protected Access)-Enterprise is designed for enterprise networks and requires a RADIUS authentication server. This requires a more complicated setup, but provides additional security (e.g. protection against dictionary attacks on short passwords).
Various kinds of the Extensible Authentication Protocol (EAP) are used for authentication. WPA-Enterprise mode is available with both WPA and WPA2[3].
You can also use the RADIUS service for User Privileged Access of network devices, such as Layer 2, Layer 3 switch, or router. In other words, If a user logs in to a network device, the user is granted not from the local user database but from the imRAD service.
The Dynamic Host Configuration Protocol(DHCP) in the imRAD allocates IP addresses to DHCP clients.
For more, refer to the RADIUS Overview and DHCP Overview.
File:imRAD_catalogue_eng_v2.pdf