CompTIA Security+ (SY0-501) — Question 18

A wireless network uses a RADIUS server that is connected to an authenticator, which in turn connects to a supplicant. Which of the following represents the authentication architecture in use?

Answer options

• A. Open systems authentication
• B. Captive portal
• C. RADIUS federation
• D. 802.1x

Correct answer: D

Explanation

The correct answer is D, 802.1x, which is a network access control protocol that utilizes RADIUS for port-based network access control. Options A and B describe different authentication methods that do not involve RADIUS in the same way, while C refers to a collaborative authentication method that is not the primary architecture in this scenario.