CMMC CMMC-CCP Book

During aCMMC assessment, organizations must provide evidence to demonstrate compliance with requiredpractices and processes. Assessors evaluate this evidence based on two key criteria:

Adequacy– Does the evidence meet the intent of the security requirement?

Sufficiency– Is there enough evidence to reasonably conclude that the practice/process is effectively implemented?

These principles are outlined in theCMMC Assessment Process Guide, which provides a structured approach for evaluating compliance.

Step-by-Step Breakdown:

✅1. Adequacy – Does the evidence fully meet the requirement?

Adequacyrefers to whether the evidence properly demonstrates that the security practice has been implemented as required.

Example: If an organization claims to enforceMulti-Factor Authentication (MFA), an assessor would checksystem configurations, login policies, and user authentication logsto confirm that MFA is actually in use.

✅2. Sufficiency – Is there enough evidence to support the claim?

Sufficiencymeans that there isenough supporting evidenceto prove compliance.

Example: If an organization providesonly one screenshot of an MFA login screen, that alone may not besufficient—additional logs, policies, and user records would help strengthen the case.

Why the Other Answer Choices Are Incorrect:

(B) Adequacy and Thoroughness❌

Thoroughnessis not a defined metric in CMMC evidence evaluation.

The focus is onwhether the evidence meets the requirement (adequacy)and if there isenough of it (sufficiency).

(C) Sufficiency and Thoroughness❌

Thoroughnessis not a recognized term in CMMC compliance validation.

Evidence must beadequate and sufficient, not just thorough.

(D) Sufficiency and Appropriateness❌

Appropriatenessis not a CMMC-defined criterion.

Thecorrect terms used in CMMC assessmentsareAdequacy(Does it meet the requirement?) andSufficiency(Is there enough proof?).

Final Validation from CMMC Documentation:

CMMC Assessment Process Guideexplicitly states that evidence must be evaluated based onadequacyandsufficiencyto confirm compliance with security practices.

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.

Final Validation from CMMC Documentation:

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

The SSP

The asset inventory

The network diagram

Thus, the correct answer is:

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

1. Understanding CMMC 2.0 Levels and CUI Handling Requirements

UnderCMMC 2.0, contractors handlingControlled Unclassified Information (CUI)must meet aminimumcertification level to be eligible for contract awards involving CUI.

CMMC 2.0 Levels:

Level 1 (Foundational) – 17 Practices

Covers onlyFederal Contract Information (FCI)security.

Does NOT meet CUI handling requirements.

Level 2 (Advanced) – 110 Practices✅

REQUIRED for handling CUI.

Aligns withNIST SP 800-171, which establishes security controls for protecting CUI.

Contractorsmust achieve Level 2for contracts requiring CUI protection.

Level 3 (Expert) – 110+ Practices

Required for contracts involvinghigh-value CUIandcritical national security information.

Includesadditionalprotections fromNIST SP 800-172.

2. Official CMMC 2.0 References Confirming Level 2 for CUI

TheCMMC 2.0 Model Overviewclearly states that Level 2 is required for contractorshandling CUI.

DFARS 252.204-7012mandates that contractors protecting CUI must implementNIST SP 800-171, which is thefoundation of CMMC Level 2.

TheDoD’s CMMC Assessment Guidefor Level 2 specifies thatorganizations handling CUI must demonstrate full implementation of 110 practices from NIST SP 800-171to qualify for contract awards.

3. Why the Other Options Are Incorrect

A. Level 1❌

Only covers FCI, not CUI.

Does notmeet DoD requirements for protectingCUI.

C. Level 3❌

While Level 3 offersadditional protectionsfor high-risk CUI, it isnot the minimumrequirement.

Level 2 is the minimumneeded to handle CUI.

D. Any level❌

OnlyLevel 2 and higherare eligible for contracts requiring CUI protection.

Level 1 doesnotmeet CUI security standards.

Step 1: Review CMMC 2.0 Reforms (Level 1 – Foundational)

As part ofCMMC 2.0, the DoD announced changes toreduce burden and costsfor companies that only handleFederal Contract Information (FCI):

DoD Statement (CMMC 2.0 Overview):

“Level 1 (Foundational) will only require an annual self-assessment, affirming implementation of the 17 FAR 52.204-21 controls.”

✅Step 2: Intent of “Reduced Assessment Costs”

The move to allowself-assessments at Level 1was explicitly designed toeliminate the costof hiring third-party assessors for organizations that only handle FCI.

Level 1 self-assessments are:

Conductedinternally by the OSC,

Affirmed annuallyby a senior company official,

Submitted via SPRS(Supplier Performance Risk System).

❌Why the Other Options Are Incorrect

B. Opt out of CMMC Assessments

✘Incorrect. Organizations must still perform aself-assessmentannually — they cannot opt out entirely.

C. Have assessment costs reimbursed by the DoD

✘No such reimbursement mechanism exists.

D. Pay no more than $500.00…

✘No such fixed cost is set or guaranteed in CMMC documentation.

UnderCMMC 2.0, all companies atLevel 1 (Foundational)are permitted toconduct self-assessmentsannually to demonstrate compliance, supporting the DoD’s goal ofreducing assessment costsfor low-risk contractors.