Which Security Concept Is Accomplished by a RADIUS Server?

SY0-701 By islever Editorial Last updated

Short answer

B AAA

Question

Which of the following security concepts is accomplished with the installation of a RADIUS server?
  1. CIA
  2. AAA Correct Answer
  3. ACL
  4. PEM

Key Takeaways

This question tests recognition of RADIUS protocol functionality versus general security acronyms, with the common trap being confusion between AAA and broader concepts like the CIA triad.

A RADIUS server implements the AAA (Authentication, Authorization, and Accounting) framework to centrally manage user network access. Community consensus confirms that RADIUS is exclusively designed to handle these three core identity verification and tracking functions.

Common mistake: Candidates often incorrectly select CIA (Confidentiality, Integrity, Availability) because it represents foundational security objectives rather than a specific server implementation, leading to conceptual mismatch.

Expert Analysis

Why the Answer Is Correct

RADIUS stands for Remote Authentication Dial-In User Service and is architecturally built around the AAA security model. Deploying a RADIUS server centralizes user authentication by validating credentials, authorizes resource access based on policy rules, and accounts for session data for compliance auditing. This direct alignment makes AAA the only accurate choice.

Why the Other Options Are Wrong

CIA describes overarching security goals (Confidentiality, Integrity, Availability) rather than a specific network protocol or server type. ACLs are static rule sets used in firewalls or routers to permit or deny traffic flows, not to manage user identities. PEM refers to Privacy-Enhanced Mail or certificate encoding formats, which serve encryption purposes entirely separate from centralized access control.

Community Comment Notes

The community unanimously validates AAA as the correct answer, consistently highlighting RADIUS's role in centralized authentication, authorization, and accounting [1][2][3]. Multiple contributors explicitly decode the acronym and emphasize its function as a dedicated networking protocol for managing service access [4][5]. These observations reinforce that understanding RADIUS's core purpose directly eliminates distractor options.

Official Reference

These links open the official vendor documentation in a new tab.

Exam Strategy

Focus on mapping specific protocols to their primary operational functions rather than memorizing isolated acronyms. Practice differentiating between theoretical security models like the CIA triad and practical identity management implementations such as AAA servers to quickly eliminate conceptual distractors.

Community Votes

B
100%

100% of anonymous learners picked answer B. Votes are pick records left by other test-takers — they are not the verified answer.

Discussion 5 contributions

Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.

From public community threads 5

  1. a4e15bd 👍 10
    B Other being a server, RADIUS is a networking protocol that provides centralized authentication, authorization and accounting for users who connect and use a network service.
  2. Glacier88 👍 3 Answered B
    RADIUS (Remote Authentication Dial-In User Service) is a network access server protocol that provides Authentication, Authorization, and Accounting (AAA) services.
  3. examreviewer 👍 3 Answered B
    RADIUS is a networking protocol that provides centralized authentication, authorization and accounting - AAA
  4. jafyyy 👍 1
    B. Remote Authentication Dial-In User Service protocol is used for AAA (Authentication, Authorization & Accounting)
  5. internslayer 👍 3 Answered B
    B. AAA

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