Cyber AB CMMC-CCA Exam With Confidence Using Practice Dumps

Access Control (AC): Wi-Fi access must be restricted to authorized users and devices. CMMC Level 2 incorporates NIST SP 800-171 AC requirements to limit and control access to systems and resources.

Identification and Authentication (IA): Wireless access requires authentication to ensure only authorized individuals/devices can connect (e.g., WPA2-Enterprise, certificates, or strong passwords).

System and Communications Protection (SC): Wi-Fi encryption and secure configuration protect data-in-transit from interception or unauthorized disclosure.

Why Other Options Are Incorrect:

A (MP, AC, PE): Media protection and physical protection are not primary domains for Wi-Fi configuration.

B (IA, MP, SI): Media protection and system/information integrity do not directly address Wi-Fi security.

D (SC, SI, PE): Physical and integrity controls are not central to wireless access security.

References (CCA Official Sources):

CMMC Model v2.0 — Domains AC, IA, SC

NIST SP 800-171 Rev. 2 — AC.L2-3.1.1, IA.L2-3.5.3, SC.L2-3.13.8 (wireless access, identification/authentication, protection of communications)

NIST SP 800-171A — Associated assessment objectives verifying Wi-Fi control and encryption

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The Physical Protection (PE) Domain requires implementation of physical access controls to prevent unauthorized access to CUI systems. Simply trusting employees or sending communications is not sufficient. However, if the server is located inside a secondary restricted room that only the IT team can access, then adequate physical protection controls are still in place.

Extract from PE.L2-3.10.x (Physical Protection Practices):

“Organizations must limit physical access to systems, equipment, and environments that process, store, or transmit CUI to authorized individuals only.”

Thus, placing the server within an additional restricted access-controlled room ensures compliance, even if the outer door is propped open for cooling.

Applicable Requirement: SC.L2-3.13.16 — “Protect the confidentiality of CUI at rest.”

Why D is Correct: Cryptographic mechanisms (e.g., full-disk encryption, database encryption, file encryption) provide the strongest protection for information at rest by preventing unauthorized disclosure if systems or media are accessed.

Why Other Options Are Insufficient:

A (Patching): Protects against vulnerabilities, but not specific to data-at-rest confidentiality.

B (File share): Provides a storage method, not protection.

C (Secure offline storage): Helps physically, but not sufficient for digital confidentiality without encryption.

References (CCA Official Sources):

NIST SP 800-171 Rev. 2 — SC.L2-3.13.16

NIST SP 800-171A — SC.L2-3.13.16 Assessment Objectives

CMMC Assessment Guide – Level 2, Data at Rest Protection

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