How many security domains can the CDSS system provide firewall services for?

The correct answer indicates that the Clinical Decision Support System (CDSS) can provide firewall services for two security domains. In the context of cybersecurity and network architecture, a security domain refers to a distinct realm or layer within which specific security policies and controls are applied. The CDSS is designed to operate within healthcare environments, where it must protect sensitive patient data while ensuring that access is granted to authorized personnel only.

The ability to provide firewall services for two security domains suggests a focus on a clear separation of concerns, possibly distinguishing between internal networks (such as those used by healthcare providers) and external networks (like the internet). This configuration helps in effectively managing risks and enforcing security measures according to the unique requirements of each domain. Other options may imply broader capabilities, which could complicate management and potentially expose the system to unnecessary security challenges.

By focusing on two well-defined security domains, the CDSS can thus enhance its security posture while maintaining efficient access control, making this answer the most accurate reflection of the system's designed functionality.