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Understanding Assessment Methods in CMMC 2.0According to theCMMC Assessment Process (CAP) Guide, assessors usethree primary assessment methodsto determine compliance with security practices:

Examine– Reviewing documents, policies, configurations, and system records.

Interview– Speaking with personnel to gather insights into security processes.

Test– Performing technical validation of system functions and security controls.

TheAssessment Team Memberis inspectingAssessment Objects(e.g., system configurations, user access control settings, policies) to determine if the OSC's evidence is sufficient forAC.L1-3.1.1 (Access Control – Authorized Users).

This activity aligns directly with theExaminemethod, which involves reviewing artifacts such as:

Access control lists (ACLs)

System user authentication logs

Account management policies

Role-based access control settings

"Observe" (Option B)is incorrect because "observing" is not an official assessment method in CMMC.

"Test" (Option A)is incorrect because the assessment is not actively executing a function but ratherreviewingevidence.

"Interview" (Option D)is incorrect because no personnel are being questioned—only documentation is being reviewed.

CMMC Assessment Process (CAP) Guide, Section 3.5 – Assessment Methods

CMMC Level 2 Assessment Guide – Access Control Practices (AC.L1-3.1.1)

Why Option C (Examine) is CorrectOfficial CMMC Documentation ReferencesFinal VerificationSince the activity involves reviewing documents and records to verify access control measures, it falls under theExaminemethod, makingOption C the correct answer.

Under DFARS and CMMC requirements, the prime contractor is responsible for ensuring its subcontractors meet the required CMMC level. Neither the DoD, The Cyber AB, nor OUSD A&S directly manages subcontractor certification.

Supporting Extracts from Official Content:

DFARS 252.204-7021: “The contractor shall ensure that its subcontractors have the appropriate CMMC level certification for the information they will handle.”

Why Option D is Correct:

Compliance responsibility flows through the contractor supply chain.

CMMC-AB (The Cyber AB) accredits assessors but does not police subcontractors.

OUSD A&S sets policy, not enforcement at contract level.

DoD agencies only require compliance at award/contract oversight level.

References (Official CMMC v2.0 Content):

DFARS 252.204-7021.

CMMC Model v2.0 governance guidance.

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Understanding CMMC 2.0 Incident Response PracticesTheIncident Response (IR) domaininCMMC 2.0 Level 2aligns withNIST SP 800-171, Section 3.6, which defines requirements forestablishing and maintaining an incident response capability.

The documentation provideddescribes an incident response capability that includes preparation, detection, analysis, containment, recovery, and user response activities.

IR.L2-3.6.1specifically requires organizations toestablish an incident handling processcovering:

Preparation

Detection & Analysis

Containment

Eradication & Recovery

Post-Incident Response

B. IR.L2-3.6.2: Incident Reporting (Incorrect)

Incident reporting focuses on reporting incidents to external parties (e.g., DoD, DIBNet),which isnot what the provided documentation describes.

C. IR.L2-3.6.3: Incident Response Testing (Incorrect)

Incident response testing ensures that the response process is regularly tested and evaluated,which isnot the primary focus of the documentation provided.

D. IR.L2-3.6.4: Incident Spillage (Incorrect)

Incident spillage specifically refers to CUI exposure or handling unauthorized CUI incidents,which isnot the scenario described.

The correct answer isA. IR.L2-3.6.1: Incident Handling, as the documentationattests to the establishment of an incident response capability.

CMMC Level 2 requires full implementation of the 110 security requirements specified in NIST SP 800-171 Rev. 2, Protecting Controlled Unclassified Information in Nonfederal Systems and Organizations. These practices form the foundation for safeguarding CUI across defense contractor systems.

NIST SP 800-53 is a broader catalog of security controls for federal systems, not specific to CUI in the defense contractor environment.

48 CFR 52.204-21 establishes basic safeguarding requirements for Federal Contract Information (FCI) and corresponds to CMMC Level 1.

DFARS 252.204-7012 defines safeguarding and incident reporting obligations but does not enumerate the specific security practices required.

Thus, Level 2 practices are aligned to NIST SP 800-171.

Reference Documents:

CMMC Model v2.0 Overview, December 2021

NIST SP 800-171 Rev. 2