Cyber AB CMMC-CCA Exam With Confidence Using Practice Dumps

CMMC scoping focuses on assets that process, store, transmit, or protect CUI. A smoke detector connected to the OSC network is an IoT device with no impact on CUI, so it is considered Out-of-Scope. The other items (data centers used by the OSC, MSP SIEM tools, and MSP offices handling OSC management) all directly affect the OSC’s CUI environment and therefore fall within scope.

Exact extracts:

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

“Security Protection Assets are those that provide security functions for CUI Assets.”

“External Service Providers (e.g., MSPs, data centers, SIEMs) that support CUI Assets are in-scope.”

“Assets that cannot affect the confidentiality of CUI (e.g., unrelated IoT devices) are considered Out-of-Scope.”

Expanded explanation:

Data centers (A): If OSC CUI is stored or processed there, they are in-scope.

SIEM tools (C): Provide security monitoring of OSC networks — a clear Security Protection Asset.

MSP office (D): MSPs providing services that affect CUI are in-scope, including their management locations.

Smoke detector (B): Despite being network-connected, it does not interact with CUI or provide protective functions; it is explicitly out-of-scope.

Why the other options are in scope:

They either process, protect, or manage CUI directly.

Excluding them would improperly narrow the assessment boundary.

The requirement for CA.L2-3.12.3 – Security Control Monitoring mandates monitoring to be performed on an ongoing basis to ensure the continued effectiveness of the controls. This is not satisfied by a yearly review alone.

CA.L2-3.12.3 Security Control Monitoring – Monitor security controls on an ongoing basis to ensure the continued effectiveness of the controls.

The OSC’s statement in their SSP that monitoring occurs on a one-year periodic basis fails to meet this requirement, because the term "ongoing basis" implies continual or recurring monitoring activities that occur throughout the system’s lifecycle—not a single annual review.

Therefore, the assessor must determine that the OSC’s implementation is not acceptable.

CMMC requires that remote maintenance sessions be terminated after use or after a defined period of inactivity. This ensures third-party maintenance access does not remain open and uncontrolled, preventing unauthorized persistence.

Exact Extracts:

MA.L2-3.7.5: “Require multifactor authentication and terminate remote maintenance sessions after each session or after a defined period of inactivity.”

Assessment Guide clarifies: “Assessors should confirm remote maintenance sessions are automatically terminated using technical means.”

NIST SP 800-171A Objective: “Test maintenance session termination after a set time of inactivity or completion of task.”

Why other options are not correct:

A: Limiting maintenance to third parties only is not a requirement. Internal staff may also perform maintenance.

B: Identification and monitoring are important, but the specific control required here is termination of remote sessions.

C: Limiting the number of personnel is not mandated by CMMC.