ISA Study Guide 2026

A SIEM (Security Information and Event Management) system collects security logs and event data from various sources across an organization's IT infrastructure. Its primary role is to aggregate, correlate, and analyze this data in real-time to detect, prioritize, and respond to security incidents and threats. This provides comprehensive visibility into the security posture and aids in proactive threat management.

Ethical considerations are deeply integrated into Monitoring & Performance Optimization, as professional conduct and integrity underpin all aspects of practice in this field.

Discretionary Access Control (DAC) is an access control model where the owner of a resource (e.g., a file or folder) can grant or revoke access permissions to other users. This means the owner has discretion over who can access their resources and what actions they can perform. While flexible, DAC can be less secure than other models as it relies on individual users to manage permissions correctly, potentially leading to misconfigurations.

Disaster Recovery & Backup encompasses both theoretical foundations and practical applications that are essential to professional practice in this field.

Vital signs should be reassessed whenever there is a change in patient condition, after interventions, or according to established facility protocols to ensure continuous monitoring.

Standard of care refers to the level of care that a reasonably competent professional with similar training would provide under similar circumstances.