Describe the RADIUS networking protocol and its uses.
What will be an ideal response?
RADIUS (Remote Authentication Dial-In User Service) is a networking protocol that provides centralized authentication, authorization, and accounting (AAA):
• Authentication: Users or devices have to authenticate before they are granted access to a network.
• Authorization: After successful authentication, users or devices are authorized to access certain services in the network.
• Accounting: The usage of these services by users or devices is accounted.
The RADIUS protocol can authenticate users on systems such as 802.1x (WiFi), dialup, PPPoE, VPNs, VoIP, and many others. Supported back-end databases are, among others, MySQL, PostgreSQL, Oracle, Novell eDirectory, OpenLDAP, Microsoft Active Directory.
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