AC-4(22)—Access Only
>Control Description
Provide access from a single device to computing platforms, applications, or data residing in multiple different security domains, while preventing information flow between the different security domains.
>Supplemental Guidance
The system provides a capability for users to access each connected security domain without providing any mechanisms to allow users to transfer data or information between the different security domains. An example of an access-only solution is a terminal that provides a user access to information with different security classifications while assuredly keeping the information separate.
>Assessment Interview Topics
Questions assessors commonly ask
Process & Governance:
- •What formal policies and procedures govern the implementation of AC-4(22) (Access Only)?
- •Who are the designated roles responsible for implementing, maintaining, and monitoring AC-4(22)?
- •How frequently is the AC-4(22) policy reviewed and updated, and what triggers policy changes?
- •What training or awareness programs ensure personnel understand their responsibilities related to AC-4(22)?
Technical Implementation:
- •Describe the specific technical mechanisms or controls used to enforce AC-4(22) requirements.
- •What automated tools, systems, or technologies are deployed to implement AC-4(22)?
- •How is AC-4(22) integrated into your system architecture and overall security posture?
- •What configuration settings, parameters, or technical specifications enforce AC-4(22) requirements?
Evidence & Documentation:
- •What documentation demonstrates the complete implementation of AC-4(22)?
- •What audit logs, records, reports, or monitoring data validate AC-4(22) compliance?
- •Can you provide evidence of periodic reviews, assessments, or testing of AC-4(22) effectiveness?
- •What artifacts would you present during a FedRAMP assessment to demonstrate AC-4(22) compliance?
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