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>> CMMC-CCA Zertifizierungsfragen <<
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109. Frage
During your review of an OSC's system security control, you focus on CMMC practice SC.L2-3.13.9 - Connections Termination. The OSC uses a custom web application for authorized personnel to access CUI remotely. Users log in with usernames and passwords. The application is hosted on a dedicated server within the company's internal network. The server operating system utilizes default settings for connection timeouts.
Network security is managed through a central firewall, but no specific rules are configured for terminating inactive connections associated with the CUI access application. Additionally, there is no documented policy or procedure outlining a defined period of inactivity for terminating remote access connections. Interviews with IT personnel reveal that they rely solely on users to remember to log out of the application after completing their work. How could the firewall be configured to help achieve the objectives of CMMC practice SC.L2-3.13.9 - Connections Termination, for the remote access application?
Antwort: C
Begründung:
Comprehensive and Detailed In-Depth Explanation:
SC.L2-3.13.9 requires "terminating connections after a defined period of inactivity." Firewall rules to terminate inactive connections (A) directly enforce this for the CUI application, meeting the practice's intent.
Encryption (B) protects transit data (SC.L2-3.13.8), IDS/IPS (C) detects threats (SI.L2-3.14.6), and IP blocking (D) limits access (AC.L2-3.1.2)-none address inactivity termination. The CMMC guide supports firewall-based timeouts.
Extract from Official CMMC Documentation:
* CMMC Assessment Guide Level 2 (v2.0), SC.L2-3.13.9: "Configure firewalls for inactivity timeouts."
* NIST SP 800-171A, 3.13.9: "Examine firewall rules for termination."
Resources:
* https://dodcio.defense.gov/Portals/0/Documents/CMMC/AG_Level2_MasterV2.
0_FINAL_202112016_508.pdf
110. Frage
You are assessing Conedge Ltd, a contractor that develops cryptographic algorithms for classified government networks. In reviewing their network architecture documents, you see they have implemented role-based access controls on their workstations using Active Directory group policies. Software developers are assigned to the "Dev_Roles" group which grants access to compile and test code modules. The "Admin_Roles" group with elevated privileges for system administration activities is restricted to the IT staff. However, when you examine the event logs on a developer workstation, you find evidence that a developer was able to enable debugging permissions to access protected kernel memory - a privileged function. Which of the following controls could have prevented the developer from executing this privileged function?
Antwort: B
Begründung:
Comprehensive and Detailed In-Depth Explanation:
AC.L2-3.1.7 - Privileged Functions requires "preventing non-privileged users from executing privileged functions." The developer's access to kernel memory suggests inherited or misconfigured permissions.
Prohibiting inheritance (B) ensures Dev_Roles don't gain Admin_Roles privileges, enforcing least privilege.
Internet removal (A), dual authorization (C), and time restrictions (D) don't directly address role-based privilege creep, per the CMMC guide.
Extract from Official CMMC Documentation:
* CMMC Assessment Guide Level 2 (v2.0), AC.L2-3.1.7: "Prevent privilege inheritance in role-based controls."
* NIST SP 800-171A, 3.1.7: "Examine RBAC configs for privilege separation." Resources:
* https://dodcio.defense.gov/Portals/0/Documents/CMMC/AG_Level2_MasterV2.
0_FINAL_202112016_508.pdf
111. Frage
A Lead Assessor is conducting an assessment for an OSC. The OSC is currently using doors and badge access to limit access to private areas of their campus to only authorized personnel. Which item is another means of controlling physical access to areas that contain CUI?
Antwort: C
Begründung:
* Applicable Requirement: PE.L2-3.10.3 - "Control physical access to organizational systems, equipment, and the respective operating environments."
* Why A is Correct: Security guards are a recognized preventive and detective physical control to limit access to only authorized individuals. Guards can verify credentials, monitor behavior, and provide real-time deterrence.
* Why Other Options Are Insufficient:
* B (Cameras): Provide monitoring and evidence, but not direct access control.
* C (Firewalls): A network control, not a physical access measure.
* D (Partition walls): Barriers may help physically separate areas but do not control who enters.
References (CCA Official Sources):
* NIST SP 800-171 Rev. 2 - PE.L2-3.10.3
* NIST SP 800-171A - PE.L2-3.10.3 Assessment Objectives
* CMMC Assessment Guide - Level 2 - Physical Security Controls
112. Frage
Removable media can pose significant cybersecurity risks to an organization if not adequately controlled and secured. Understanding the dangers of this, an OSC has crafted a meticulous removable media policy. It defines removable media, types of removable media, examples of removable media, etc. The policy limits the use of removable media unless authorized; even then, the media must be scanned for malware. Organizational removable media has specific signatures unique to organizational systems and provided to a defined group of personnel. Any data stored on such media is encrypted, and the OSC has disabled autorun and closed some ports on their computer systems. The contractor also has deployed an endpoint protection solution for every employee searched while entering or leaving the facility. Users must also pass through a walk-in metal detector to ensure they do not sneak in thumb drives and SD cards. Based on the OSC's effort, how would you score their implementation of CMMC practice MP.L2-3.8.7 - Removable Media?
Antwort: D
Begründung:
Comprehensive and Detailed In-Depth Explanation:
MP.L2-3.8.7 requires "controlling removable media use on systems." The OSC's policy, restrictions, scanning, encryption, and technical/physical controls fully meet this, scoring Met (+1) for this 1-point practice. No gaps suggest Partial (C) or Not Met (D), and N/A (A) doesn't apply.
Extract from Official CMMC Documentation:
* CMMC Assessment Guide Level 2 (v2.0), MP.L2-3.8.7: "Control removable media with policy, scanning, and encryption."
* DoD Scoring Methodology: "1-point practice: Met = +1."
Resources:
* https://dodcio.defense.gov/Portals/0/Documents/CMMC/AG_Level2_MasterV2.
0_FINAL_202112016_508.pdf
113. Frage
You are performing an on-site assessment for a defense contractor that develops and manufactures embedded control systems for military drones. During your documentation review, you discover they have a System Security Plan (SSP) outlining a configuration management process. The SSP mentions the creation of baseline configurations for their drone control systems, but details are limited. You interview the IT manager responsible for configuration management. They explain they use a commercial configuration management tool to capture hardware and software configurations for the drone systems. They confirm that the baseline configurations include initial software versions but do not track firmware or network configurations.
Additionally, while they update software versions through the tool, they do not have a documented process for reviewing and updating baseline configurations in response to security vulnerabilities or system modifications. Which of the following actions would be the MOST appropriate recommendation for the contractor to improve their compliance with CM.L2-3.4.1 - System Baselining?
Antwort: B
Begründung:
Comprehensive and Detailed In-Depth Explanation:
CM.L2-3.4.1 requires "establishing and documenting baseline configurations, reviewed and updated as needed." The lack of firmware/network inclusion and a review process fails objective [c]. A documented review process addressing all components and security risks (A) directly corrects this, aligning with CMMC intent. Ad-hoc updates (B) lack structure, tool replacement (C) isn't justified, and update frequency (D) is unrelated. The guide emphasizes periodic review.
Extract from Official CMMC Documentation:
* CMMC Assessment Guide Level 2 (v2.0), CM.L2-3.4.1: "Review and update baselines for all components as needed."
* NIST SP 800-171A, 3.4.1: "Examine process for baseline updates."
Resources:
* https://dodcio.defense.gov/Portals/0/Documents/CMMC/AG_Level2_MasterV2.
0_FINAL_202112016_508.pdf
114. Frage
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