RADIUS

Radius may refer to any of the following:

1. Developed by Livingston Enterprise, RADIUS is short for Remote Authentication Dial-in User Service. It is an authentication program used on computers and networking equipment to determine the rights of users logging into either device.

2. With geometry, a radius (r) is a straight line from the center of a circle or sphere to its perimeter.

Circle, Computer acronyms, Measurement, Network terms, Port, R, TACACS