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For questions about RADIUS, an authentication and accounting service defined by RFC 2865.

Remote Authentication Dial In User Service (RADIUS)

RADIUS is an authentication and accounting service defined by RFC 2865.

Among many other things, RADIUS can be used to implement 802.1X port-based security, as part of a strategy to keep unauthorized users off of a network (or on a non-sensitive network in parallel with secured network.)

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