Applicable Requirement: AC.L2-3.1.17 — “Authorize wireless access prior to allowing such connections.”

Correct Interpretation: Strong authentication and encryption methods (e.g., WPA2-Enterprise, WPA3-Enterprise) are required to protect wireless communications and enforce authorization.

Why C is Correct: WPA2-Enterprise uses 802.1X authentication (often with RADIUS), ensuring that only authorized users/devices can connect. This directly supports AC.L2-3.1.17.

Why Other Options Are Insufficient:

A (Layer 3 switch): Network hardware but not specifically a wireless access control mechanism.

B (IDS): Detects intrusions but does not prevent or authorize wireless access.

D (Frequency-hopping): Obsolete method, not aligned with modern encryption/authentication requirements.

References (CCA Official Sources):

NIST SP 800-171 Rev. 2 — AC.L2-3.1.17

NIST SP 800-171A — AC.L2-3.1.17 Assessment Objectives

CMMC Assessment Guide – Level 2, AC.L2-3.1.17

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