What does RADIUS stand for?

The correct answer is B. Remote Access Dial-in User Service. RADIUS stands for Remote Authentication Dial-In User Service, a networking protocol that provides centralized authentication, authorization, and accounting (AAA) management for users connecting to a network service.

Submitted by mateo_ar· Apr 18, 2026Access Controls

Question

Options

ARemote Access Dialup User Systems
BRemote Access Dial-in User Service
CRevoke Access Deny User Service
DRoaming Access Dial-in User System

How the community answered

(39 responses)

A
3% (1)
B
95% (37)
D
3% (1)

Why each option

RADIUS stands for Remote Authentication Dial-In User Service, a networking protocol that provides centralized authentication, authorization, and accounting (AAA) management for users connecting to a network service.

ARemote Access Dialup User Systems

"Dialup User Systems" is not the correct expansion of the acronym.

BRemote Access Dial-in User ServiceCorrect

RADIUS is an industry-standard client/server protocol that provides centralized authentication, authorization, and accounting (AAA) services for users who connect to a network service. Its full name is Remote Authentication Dial-In User Service.

CRevoke Access Deny User Service

"Revoke Access Deny User Service" incorrectly interprets the meaning and components of the acronym.

DRoaming Access Dial-in User System

"Roaming Access Dial-in User System" incorrectly uses "Roaming" and "System" instead of "Remote" and "Service."

Concept tested: RADIUS protocol definition

Source: https://learn.microsoft.com/en-us/windows-server/networking/technologies/nps/nps-top

Topics

#RADIUS#AAA protocols#Authentication

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