A tabletop exercise is a type of security exercise that involves a simulated scenario of a security incident and a discussion of how the security team would respond to it1. A tabletop exercise is a low-impact and cost-effective way to test the security team's preparedness, identify gaps and areas for improvement, and enhance communication and coordination among team members2. A tabletop exercise is different from a red-team exercise, which is a simulated attack by an authorized group of ethical hackers to test the security defenses and response capabilities of an organization3. A business continuity plan testing is a process of verifying that an organization can continue its essential functions and operations in the event of a disaster or disruption4. A functional exercise is a type of security exercise that involves a realistic simulation of a security incident and requires the security team to perform their roles and responsibilities as if it were a real event.
References: 1:
https://www.isaca.org/resources/isaca-journal/issues/2022/volume-1/cybersecurity-incident-response-exercise-gu
2: https://www.linuxjournal.com/content/security-exercises 3:
https://www.imperva.com/learn/application-security/red-team-blue-team/ 4:
https://www.ready.gov/business-continuity-plan : https://www.ready.gov/exercises