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CMMC requires physical access to systems containing or transmitting CUI to be limited to authorized individuals and for access records to be maintained. Badge readers with unique identification provide individual accountability, access control enforcement, and auditable access logs, which are stronger than labels, cameras, or keypads.

Exact Extracts:

PE.L2-3.10.1: “Limit physical access to organizational systems, equipment, and the respective operating environments to authorized individuals.”

PE.L2-3.10.5: “Maintain audit logs of physical access.”

CMMC Assessment Guide: “Badge systems with access control lists and logs are considered a best method for meeting physical access requirements.”

Why the other options are not correct:

A: Labels and lists do not prevent unauthorized access.

C: Cameras monitor but do not restrict access; they are detective, not preventive.

D: Keypads do not provide individual accountability (codes can be shared).

Applicable Requirement: CAP – Interview Guidance.

Why C is Correct: Interviews must be directed to personnel responsible for implementing, performing, or supporting practices to ensure accurate and objective evidence is collected.

Why Other Options Are Insufficient:

A: Yes/no questions do not provide sufficient evidence detail.

B: OSC personnel cannot ask themselves assessment questions; only assessors may conduct interviews.

D: Group interviews may be used in some cases, but CAP stresses targeted interviews for evidence reliability.

References (CCA Official Sources):

CMMC Assessment Process (CAP) v1.0 — Interview Requirements

NIST SP 800-171A — Use of Interview as an Assessment Method

Applicable Requirement: IR.L2-3.6.1 — “Establish an operational incident-handling capability for organizational systems that includes preparation, detection, analysis, containment, recovery, and user response activities.”

Validation Expectation: For this practice, the CCA must confirm that the OSC:

Tracks incidents consistently,

Documents incident details (who, what, when, where, and how), and

Maintains incident records to support analysis and corrective action.

Why A is Correct: Tracking and documenting incidents demonstrates that the OSC has an operational incident-handling capability and provides objective evidence of detection, response, and lessons learned.

Why Other Options Are Insufficient:

B (Sources configured/tuned): Helpful for detection, but not sufficient by itself.

C (Law enforcement notified): This may occur in certain cases, but it is not required by CMMC Level 2.

D (Forensics): Deep forensic investigation may be useful, but CMMC requires incident response capability, not mandatory forensic-level activities.

References (CCA Official Sources):

NIST SP 800-171 Rev. 2 — IR.L2-3.6.1

NIST SP 800-171A — IR.L2-3.6.1 Assessment Objectives (tracking, documenting, handling incidents)

CMMC Assessment Guide – Level 2 — Incident Reporting

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Applicable Requirement (CAP – Planning Phase): Both the OSC (Client) and the CCA are responsible for protecting sensitive evidence and CUI during assessment. This includes documenting risks and mitigations for how such information is handled, especially during virtual collection.

Why D is Correct: CAP requires assessors and OSCs to jointly establish processes ensuring safeguarding of CUI evidence. Both parties must record and agree to risks and mitigations as part of the assessment plan.

Why Other Options Are Insufficient:

A & B: Responsibility is shared, not one-sided.

C: Recording by the assessor alone does not fulfill CAP’s joint responsibility requirement.

References (CCA Official Sources):

CMMC Assessment Process (CAP) v1.0 — Planning Phase (Handling CUI and Sensitive Evidence)

Code of Professional Conduct — Assessor responsibility for safeguarding CUI

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The test assessment method means the assessor actively exercises or stimulates the system (or object) under defined conditions to compare actual results with expected behavior. This goes beyond review or observation and involves hands-on validation.

Exact Extracts:

NIST SP 800-171A: “The test method is the process of exercising assessment objects under specified conditions to compare actual with expected behavior.”

CMMC Assessment Guide: “Testing requires assessors to observe the execution of functions, mechanisms, or activities to confirm effectiveness.”

Why the other options are not correct:

A: This defines Examine (not Test).

B: This aligns with Interview or compliance review, not Test.

D: This is a generic definition but does not capture the essence of Test (direct execution under conditions).

In CMMC scoping, assets are categorized based on where CUI is processed, stored, or transmitted. According to the CMMC Scoping Guide for Level 2, if CUI is only stored and used in HQ and Site A, those locations contain CUI Assets. Since Site B neither stores, processes, nor transmits CUI, its assets are considered Out of Scope.

Exact extracts:

“CUI Assets are those that store, process, or transmit CUI.”

“Assets that do not process, store, or transmit CUI, and cannot provide access to CUI, are considered Out-of-Scope.”

“Only those assets in the scope of CMMC assessment will be evaluated against practices.”

Why the other options are incorrect:

B: Site B has VPN connectivity, but if it does not use or process CUI, its assets remain out of scope. Connectivity alone does not bring it into scope.

C/D: The terms “Certification in Risk Management Assurance” are not valid CMMC asset categories.

References (CCA documents / Study Guide):

CMMC Assessment Scope – Level 2 Scoping Guide (CUI Assets, Out-of-Scope Assets).

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The Lead Assessor’s readiness checks focus on logistics, scope, evidence availability, and risk awareness to ensure the assessment can proceed. It is not the assessor’s role to advise or determine if the OSC could achieve a higher certification level — the OSC selects its target level.

Exact extracts:

“Lead Assessors must confirm readiness by verifying logistics, scope boundaries, risks, and evidence availability.”

“Assessors do not advise OSCs on selecting certification levels or alternative approaches; this is outside the assessment scope.”

Why the other options are required:

A: OSC risks must be identified and discussed as part of scoping.

B: Logistics (scheduling, facilities, communications) must be confirmed.

D: Evidence must be available and accessible to avoid delays.

For hybrid and cloud environments, the Customer Responsibility Matrix is the critical artifact. It identifies which security responsibilities are handled by the CSP and which remain with the OSC, directly impacting scope.

Extract:

“The OSC must provide responsibility matrices or equivalent documentation that clearly delineates which security controls are the responsibility of the provider and which are retained by the OSC.”

This is necessary for the Lead Assessor to define assessment scope boundaries.

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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CMMC Level 2 requires the ability to control and monitor physical access to systems and facilities containing CUI. The best practice is a badge-based access control system, which provides individual accountability, access tracking, and historical audit records. Keys and keypads do not provide individual traceability. Cameras alone do not prevent unauthorized entry.

Exact Extracts (official CMMC Assessor/Study documents):

PE.L2-3.10.1: “Limit physical access to organizational systems, equipment, and the respective operating environments to authorized individuals.”

PE.L2-3.10.3: “Escort visitors and monitor visitor activity.”

PE.L2-3.10.5: “Access records must be maintained.”

CMMC Assessment Guide clarifies that acceptable methods include badging systems with individual accountability for traceability.

Why the other options are not correct:

A (keys): Keys do not provide audit logs or individual accountability.

B (cameras): Monitoring alone is insufficient; prevention and control are required.

D (keypads): Shared codes do not provide unique traceability or access history per user.