A networking protocol, operating on port 1812 that provides centralized Authentication, Authorization, and Accounting management for users who connect and use a network service. Most wireless routers, WLAN controllers, and access points do not natively support authenticating a logon against Active Directory. RADIUS creates a way for your WAPs or WLAN controller to take username and password credentials from a user and pass those through to Active Directory to be authenticated. This means that, instead of having a generic WiFi password that everyone knows, you can log on to the WiFi with an AD username and password. This centralizes your identity management and provides more secure access control to your network.