GridEx (C) is a major, biennial cybersecurity exercise coordinated by the North American Electric Reliability Corporation (NERC) and other stakeholders. It typically occurs in odd years and involves multiple entities from across the grid, simulating large-scale cyber and physical attacks.
GridEx exercises culminate in a public Lessons Learned report to improve preparedness.
CRPA (A) and CTEP (D) are different programs/exercises, and E-ISAC (B) is the Electricity Information Sharing and Analysis Center, not an exercise.
GICSP recognizes GridEx as a critical event for testing incident response capabilities in ICS sectors.
[Reference:, , GICSP Official Study Guide, Domain: ICS Security Operations & Incident Response, , NERC GridEx Official Reports, , GICSP Training on ICS Exercises and Drills]
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