Cyber AB CMMC-CCP - Certified CMMC Professional (CCP) Exam

Understanding IA.L1-3.5.1 (Identification and Authentication Requirements)TheCMMC 2.0 Level 1practiceIA.L1-3.5.1aligns withNIST SP 800-171, Requirement 3.5.1, which mandates that organizationsidentify system users, processes acting on behalf of users, and devicesto ensure proper access control.

To comply with this requirement, anOrganization Seeking Certification (OSC)must maintain documentation that demonstrates:

A unique identifier (username) for each system user

Mapping of system accounts to specific individuals

Identification of devices and automated processes that access systems

This documentation directly satisfies IA.L1-3.5.1because it showshow system users are uniquely identified and linked to specific accountswithin the environment.

Alist of users and their assigned accountsconfirms that the organization has a structured method oftracking access and authentication.

It allows auditors to verify thateach user has a distinct identityand that access control mechanisms are properly applied.

A. Procedures for implementing access control lists (Incorrect)

While access control lists (ACLs) are relevant for authorization, they do notidentify users or devicesspecifically, making them insufficient as primary evidence for IA.L1-3.5.1.

B. List of unauthorized users that identifies their identities and roles (Incorrect)

Identifying unauthorized users does not fulfill the requirement of trackingauthorizedusers, devices, and processes.

D. Physical access policy stating "All non-employees must wear a special visitor pass or be escorted" (Incorrect)

This pertains tophysical security, not system-baseduser identification and authentication.

The correct answer isC. User names associated with system accounts assigned to those individuals, as thisdirectly satisfies the identification requirement of IA.L1-3.5.1.

In the Cybersecurity Maturity Model Certification (CMMC) assessment process, the presentation of the Final Recommended Assessment Findings is a critical step. According to the CMMC Assessment Process guidelines, the Lead Assessor is responsible for compiling and presenting these findings. The prescribed method for this presentation is the utilization of the standardized CMMC Findings Brief template.

Step-by-Step Explanation:

Responsibility of the Lead Assessor:

The Lead Assessor oversees the assessment process and is tasked with compiling the Final Recommended Assessment Findings.

Utilization of the CMMC Findings Brief Template:

To ensure consistency and adherence to CMMC standards, the Lead Assessor must use the official CMMC Findings Brief template when presenting the assessment findings.

Presentation of Findings:

The findings, documented in the CMMC Findings Brief template, are then presented to the Organization Seeking Certification (OSC). This presentation ensures that the OSC receives a clear and standardized report of the assessment outcomes.

In aCMMC Level 2 assessment, theOrganization Seeking Certification (OSC)is responsible for identifying theassessment scopebased on theCMMC Scoping Guidanceprovided by theCyber AB (Cyber Accreditation Body) and DoD.

The OSC must determine which assets and systems handleControlled Unclassified Information (CUI)and categorize them accordingly.

TheCMMC Assessment Guideis the best source for determining the sources of evidence for a given practice because it provides specific guidance on how organizations should implement and demonstrate compliance with CMMC practices. Each CMMC level has its own assessment guide (e.g.,CMMC Assessment Guide – Level 1, Level 2), detailing expected evidence and assessment procedures.

CMMC Assessment Guide (Primary Source for Evidence)

TheCMMC Assessment Guideexplicitly outlines the evidence required to verify compliance with each practice.

It provides detailed instructions on assessment objectives, clarifying what assessors should look for when determining compliance.

The guide breaks down each practice intoassessment objectives, helping organizations prepare appropriate documentation and artifacts.

Other Documents and Why They Are Not the Best Choice:

NIST SP 800-53 (Option A)

WhileNIST SP 800-53provides a comprehensive catalog of security and privacy controls, it does not focus on CMMC-specific evidence requirements.

It serves as a foundational cybersecurity framework but does not define the specific artifacts required for CMMC assessment.

NIST SP 800-53A (Option B)

NIST SP 800-53Aprovides guidance on assessing security controls but is not tailored to the CMMC framework.

It includes general control assessment procedures, but theCMMC Assessment Guideis more precise in defining the evidence needed for CMMC compliance.

CMMC Assessment Scope (Option C)

TheCMMC Assessment Scopedocument outlines which systems, assets, and processes are subject to assessment.

While important for defining boundaries, it does not provide details on specific evidence requirements for each practice.

CMMC Assessment Guide (Level 2) – Section on "Assessment Objectives"

This document details how evidence is collected and evaluated for each CMMC practice.

Example: ForAC.L2-3.1.1 (Access Control – Limit System Access), the guide specifies that assessors should verify documented policies, system configurations, and audit logs.

CMMC Model Overview (Official DoD Documents)

Emphasizes thatCMMC Assessment Guidesare the official reference for determining sources of evidence.

Detailed Justification:References from Official CMMC Documents:Conclusion:TheCMMC Assessment Guideis the most authoritative source for determining the required evidence for a given practice in CMMC assessments. It provides detailed breakdowns of assessment objectives, required artifacts, and verification steps necessary for compliance.

When preparing forCMMC compliance, organizations must ensure that theirnetwork configurations align with required cybersecurity controls. Ifnetwork administratorsdisagree on certain configurations, the mostobjective and accurateway to resolve the disagreement is by referencingofficial CMMC guidanceandNIST SP 800-171 requirements, which form the foundation of CMMC Level 2.

CMMC Assessment Guides as the Primary Reference

TheCMMC Assessment Guides (Level 1 & Level 2)provide clearinterpretationsof security practices.

Theyexplain how each practice should be implemented and assessedduring certification.

NIST SP 800-171 as the Compliance Baseline

CMMC Level 2is based directly onNIST SP 800-171, which outlines the110 security controlsrequired for protectingControlled Unclassified Information (CUI).

Network configurations must complywith NIST-defined security requirements, including:

Access Control (AC) – Ensuring least privilege principles.

Audit and Accountability (AU) – Logging and monitoring network activity.

System and Communications Protection (SC) – Secure network design and encryption.

Why the Other Answer Choices Are Incorrect:

(A) Consult with the CEO of the company:

ACEO is not necessarily a cybersecurity expertand may not be familiar with CMMC technical requirements.

Technical compliance decisions should be based onCMMC and NISTframeworks, not executive opinions.

(C) Go with the network administrator's ideas with the least stringent controls:

Choosingless stringent controls increases security riskand could lead toCMMC non-compliance.

(D) Go with the network administrator's ideas with the most stringent controls:

While security is important,more stringent controlsmay introduceoperational inefficienciesorunnecessary coststhat are not required for compliance.

The correct approach is to implement what is required by CMMC and NIST SP 800-171, no more and no less.

TheCMMC Assessment GuidesandNIST SP 800-171 Rev. 2areofficial sourcesthat provide the most reliable guidance on compliance.

CMMC Level 2 is entirely based on NIST SP 800-171, making it the definitive source for resolving security disagreements.

Step-by-Step Breakdown:Final Validation from CMMC Documentation:Thus, the correct answer is:

B. Consult the CMMC Assessment Guides and NIST SP 800-171.

Understanding the “Verify Evidence and Record Gaps” Activity in a CMMC AssessmentDuring aCMMC Level 2 Assessment, theAssessment Teamfollows a structured methodology toverify evidenceand determine whether theOrganization Seeking Certification (OSC)has met all required practices. One of the key activities in this process is"Verify Evidence and Record Gaps", which ensures that the assessment findings accurately reflect any missing or inadequate compliance evidence.

Step-by-Step Breakdown:✅1. Primary Intent: Identifying Gaps Between Required and Collected Evidence

TheAssessment Teamcompares the evidence provided by the OSC against theCMMC practice requirements.

If evidence ismissing, insufficient, or inconsistent, assessors mustdocument the gapand describe what is lacking.

This ensures that compliance deficiencies are clearly identified, allowing the OSC to understand what must be corrected.

✅2. How This Process Works in a CMMC Assessment

Assessorsreview collected documentation, system configurations, policies, and interview responses.

They verify that the evidencematches the expected implementationof a practice.

If gaps exist, they arerecordedfor discussion and potential remediation before assessment completion.

✅3. Why the Other Answer Choices Are Incorrect:

(A) Map test and demonstration responses to CMMC practices.❌

Incorrect:While mapping evidence to CMMC practices is part of the assessment, theprimary intentof the "Verify Evidence and Record Gaps" step is toidentify deficiencies, not just mapping responses.

(B) Conduct interviews to test process implementation knowledge.❌

Incorrect:Interviews are a method used during evidence collection, but they arenot the primary focusof the verification and gap analysis step.

(C) Determine the one-to-one relationship between a practice and an assessment object.❌

Incorrect:The assessment teamreviews multiple sources of evidencefor each practice, and some practices require multiple assessment objects. The goal isnot a strict one-to-one mappingbut rathera holistic validation of compliance.

Final Validation from CMMC Documentation:TheCMMC Assessment Process Guidestates that"Verify Evidence and Record Gaps"is the step where assessorscompare expected evidence against what has been provided and document discrepancies. This ensurestransparent assessment findings and remediation planning.

Thus, the correct answer is:

D. Identify and describe differences between what the Assessment Team required and the evidence collected.

Understanding the "Examine" Assessment Method in CMMC 2.0CMMC 2.0 usesthree assessment methodsto evaluate security compliance:

Examine– Reviewing, inspecting, observing, studying, or analyzing assessment objects (e.g., policies, system documentation).

Interview– Speaking with personnel to verify knowledge and responsibilities.

Test– Performing technical validation to check system configurations.

TheCMMC Assessment Process (CAP)definesExamineas the method used toreview or analyze assessment objects, such as policies, procedures, configurations, and logs.

Relevant CMMC 2.0 Reference:

A. Test → Incorrect

"Test" involvesexecutinga function to validate its security (e.g., verifying access controls through a live system test).

B. Assess → Incorrect

"Assess" is a broad term; CMMC explicitly defines "Examine" as the method for reviewing documentation.

C. Examine → Correct

"Examine" is the official term forreviewing policies, procedures, configurations, or logs.

D. Interview → Incorrect

"Interview" involvesverbal discussions with personnel, not document analysis.

Why is the Correct Answer "Examine" (C)?

CMMC Assessment Process (CAP) Document

Defines "Examine" asanalyzing assessment objects (e.g., policies, procedures, logs, documentation).

NIST SP 800-171A

Specifies "Examine" as a method toreview security controls and configurations.

CMMC 2.0 References Supporting this Answer:

Understanding Access Control in CMMCAccess control refers to the process ofgranting or denyingspecific requests to:

Obtain and use information

Access information processing services

Enter specific physical locations

TheAccess Control (AC) domain in CMMCis based onNIST SP 800-171 (3.1 Access Control family)and includes requirements to:

✅Implement policies for granting and revoking access.

✅Restrict access to authorized personnel only.

✅Protect physical and digital assets from unauthorized access.

Since the questionbroadly asks about the process of granting or denying access to information, services, and physical locations, the correct answer isA. Access Control.

B. Physical access control❌Incorrect.Physical access controlis asubsetof access control that only applies tophysical locations(e.g., keycards, security guards, biometrics). The question includesinformation and services, makinggeneral access controlthe correct choice.

C. Mandatory access control (MAC)❌Incorrect.MAC is a specific type of access controlwhere access is strictly enforced based onsecurity classifications(e.g., Top Secret, Secret, Confidential). The questiondoes not specify MAC, so this is incorrect.

D. Discretionary access control (DAC)❌Incorrect.DAC is another specific type of access control, whereownersof data decide who can access it. The question asksgenerallyabout granting/denying access, makingaccess control (A)the best answer.

Why the Other Answers Are Incorrect

CMMC 2.0 Model - AC.L2-3.1.1 to AC.L2-3.1.22– Covers access control requirements, includingcontrolling access to information, services, and physical spaces.

NIST SP 800-171 (3.1 - Access Control Family)– Defines the general principles of access control.

CMMC Official ReferencesThus,option A (Access Control) is the correct answer, as it best aligns withCMMC access control requirements.

In theCMMC 2.0 Assessment Process, after theAssessment Final Recommended Findings Brief, theLead Assessor and Assessment Team Membersmustreview the accuracy and validity of the Organization Seeking Certification (OSC)’s updated Plan of Action & Milestones (POA&M) and any accompanying evidence or scheduled collectionswithin180 days.

TheCMMC Assessment Process (CAP)outlines that organizations haveup to 180 daysto address identifieddeficienciesafter their initial assessment.

During this time, the OSC can update itsPOA&M with additional evidenceto demonstrate compliance.

Relevant CMMC 2.0 Reference:

A. 90 days → Incorrect

The CMMC CAP does not impose a90-day limiton POA&M updates; instead,180 daysis the standard timeframe.

B. 180 days → Correct

PerCMMC Assessment Process guidelines, theLead Assessor and Teammust review updateswithin 180 days.

C. 270 days → Incorrect

No official CMMC documentation mentions a270-dayreview period.

D. 360 days → Incorrect

The process must be completedfar sooner than 360 daysto maintain compliance.

Why is the Correct Answer 180 Days (B)?

CMMC Assessment Process (CAP) Document

Defines the180-day windowfor the OSC to update itsPOA&M and submit evidencefor review.

CMMC 2.0 Official Guidelines

Specifies that organizations are givenup to 180 daysto remediate deficiencies before reassessment.

CMMC 2.0 References Supporting this Answer:

CMMC Level 2is designed to alignfullywithNIST SP 800-171, which consists of110 security controls (practices).

This meansall 110 practicesfrom NIST SP 800-171 are required for aCMMC Level 2 certification.

How Many Practices Are Included in CMMC Level 2?Breakdown of Practices in CMMC 2.0CMMC Level

Number of Practices

Level 1

17 practices(Basic Cyber Hygiene)

Level 2

110 practices(Aligned with NIST SP 800-171)

Level 3

Not yet finalized but expected to exceed 110

Since CMMC Level 2 mandatesall 110 NIST SP 800-171 practices, the correct answer isC. 110 practices.

A. 17 practices❌Incorrect.17 practicesapply only toCMMC Level 1, not Level 2.

B. 72 practices❌Incorrect. There is no CMMC level with72 practices.

D. 180 practices❌Incorrect. CMMC Level 2only requires 110 practices, not 180.

Why the Other Answers Are Incorrect

CMMC 2.0 Model– Confirms thatLevel 2 includes 110 practicesaligned withNIST SP 800-171.

NIST SP 800-171 Rev. 2– Outlines the110 security controlsrequired for handlingControlled Unclassified Information (CUI).

CMMC Official ReferencesThus,option C (110 practices) is the correct answer, as per official CMMC guidance.