RADIUS
securityRemote Authentication Dial-In User Service — a networking protocol that provides centralised authentication, authorisation, and accounting for users.
Pronunciation
Correct
RAY-dee-us
/ˈreɪdiəs/
Pronounced exactly like the geometric term 'radius' (the line from the centre of a circle to its edge). Stands for Remote Authentication Dial-In User Service.
Source: www.rfc-editor.org(official spec)