CMMC CMMC-CCP Book

ACertified CMMC Professional (CCP)advising anOrganization Seeking Certification (OSC)must ensure thatFederal Contract Information (FCI)andControlled Unclassified Information (CUI)are properly documented within required security documents.

Step-by-Step Breakdown:✅1. System Security Plan (SSP)

CMMC Level 2requires anSSPto documenthow CUI is protected, including:

Security controlsimplemented

Asset categorization(CUI Assets, Security Protection Assets, etc.)

Policies and proceduresfor handling CUI

✅2. Asset Inventory

Anasset inventorylistsall relevant IT systems, applications, and hardwarethat store, process, or transmitCUI or FCI.

TheCMMC Scoping Guiderequires OSCs to identifyCUI-relevant assetsas part of their compliance.

✅3. Network Diagram

Anetwork diagramvisually representshow data flows across systems, showing:

WhereCUI is transmitted and stored

Security boundaries protectingCUI Assets

Connectivity betweenCUI Assets and Security Protection Assets

✅4. Why the Other Answer Choices Are Incorrect:

(B) Within the hardware inventory, data flow diagram, and in the network diagram❌

While adata flow diagramis useful,hardware inventory alone is insufficientto document CUI.

(C) Within the asset inventory, in the proposal response, and in the network diagram❌

Aproposal responseis not a required document for CMMC assessments.

(D) In the network diagram, in the SSP, within the base inventory, and in the proposal response❌

Base inventoryis not a specific CMMC documentation requirement.

TheCMMC Assessment Guideconfirms that FCI and CUI must be documented in:

The SSP

The asset inventory

The network diagram

Final Validation from CMMC Documentation:Thus, the correct answer is:

✅A. "In the SSP, within the asset inventory, and in the network diagram."

Understanding the CMMC Level 2 Assessment ProcessWhen anOrganization Seeking Certification (OSC)engages aCertified Third-Party Assessment Organization (C3PAO)to conduct aCMMC Level 2 Assessment, anAssessment Planis developed to outline the scope, methodology, and logistics of the assessment.

According to theCMMC Assessment Process (CAP) Guide, theAssessment Plan must be formally agreed upon and signed off by:

Lead Assessor– The individual responsible for overseeing the execution of the assessment.

C3PAO (Certified Third-Party Assessment Organization)– The entity conducting the assessment.

TheLead Assessorensures that theAssessment Plan aligns with CMMC-AB and DoD requirements, including methodology, objectives, and evidence collection.

TheC3PAOprovides organizational approval, confirming that the assessment is conducted according toCMMC-AB rules and contractual agreements.

A. OSC and Sponsor (Incorrect)

TheOSC (Organization Seeking Certification)is involved in planning but does not sign off on the plan.

Asponsoris not part of the sign-off process in CMMC assessments.

B. OSC and CMMC-AB (Incorrect)

TheOSCdoes not formally approve theAssessment Plan—this responsibility belongs to the assessment team.

TheCMMC-ABdoes not sign off on individualAssessment Plans.

D. C3PAO and Assessment Official (Incorrect)

"Assessment Official" isnot a defined rolein the CMMC assessment process.

TheC3PAOis involved, but it must be theLead Assessorwho signs off, not an unspecified official.

The correct answer isC. Lead Assessor and C3PAO.

TheLead Assessorensures assessment integrity, while theC3PAOprovides official authorization.

TheCMMC 2.0 Level 2requirementSC.L2-3.13.14comes fromNIST SP 800-171, Security Requirement 3.13.14, which mandates that organizations mustcontrol and monitor the use of VoIP (Voice over Internet Protocol) technologiesif used within their system boundary.

If a systemdoes not use VoIP technology, then this control isNot Applicable (N/A)because there is nothing to assess.

When a requirement is marked as Not Applicable (N/A), it means the OSC does not use the technology or process covered by that controlwithin its assessment boundary.

No assessment procedures are neededsince there is no VoIP system to evaluate.

Option A (Existing telephone system in scope)is incorrect becausetraditional (non-VoIP) telephone systems are not covered by SC.L2-3.13.14—only VoIP is within scope.

Option B (Error, contact the Lead Assessor)is incorrect because markingSC.L2-3.13.14 as N/A is valid if VoIP is not used. This is not an error.

Option C (VoIP in scope but using FIPS-validated encryption, so it doesn’t need to be assessed)is incorrect becauseeven if VoIP uses FIPS-validated encryption, the control would still need to be assessed to ensure monitoring and usage control are in place.

CMMC 2.0 Level 2 Assessment Guide – SC.L2-3.13.14

NIST SP 800-171, Security Requirement 3.13.14

CMMC Scoping Guidance – Determining Not Applicable (N/A) Practices

Understanding SC.L2-3.13.14 – Control and Monitor the Use of VoIP TechnologiesWhy Option D is CorrectOfficial CMMC Documentation ReferencesFinal VerificationIfVoIP is not used within the OSC’s system boundary, the control does not require assessment, making Option D the correct answer.

Per the CMMC Assessment Process (CAP), when planning an assessment, the Lead Assessor must coordinate with the Organization Seeking Certification (OSC) to select interview participants who can provide clarity and understanding of their practice activities. The intent is to interview individuals directly involved with and knowledgeable about the processes and practices under review, rather than selecting personnel based solely on rank, clearance, or formal expertise in CMMC.

This ensures the assessment is evidence-based and grounded in how practices are actually performed within the OSC.

Reference Documents:

CMMC Assessment Process (CAP), v1.0