What does RADIUS stand for?

RADIUS stands for Remote Authentication Dial-In User Service. This protocol is primarily used for providing user authentication, authorization, and accounting services for users who connect and use a network service. It is especially common in scenarios where remote access is required, such as with dial-up connections, Wi-Fi networks, and VPNs.

The term "Remote Authentication" emphasizes the protocol's role in validating users remotely, while "Dial-In User Service" reflects its origins when it was developed to manage access for users dialing into a network. This makes it essential for secure user management, particularly in environments where network resources need to be controlled and monitored.

Understanding the purpose and functionality of RADIUS is crucial in networking contexts, particularly for managing user access in various networking scenarios.