GRID Study Guide 2026

Everything you need to pass the GRID exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.

📋 GRID Exam Format at a Glance

Questions

180 min

Time Limit

71%

Passing Score

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📚 GRID Topics to Study (21)

ICS Security Standards and Compliance · 7 cards ICS Security Standards and Compliance · 7 cards ICS Security Standards and Compliance · 7 cards Active Defense in ICS · 6 cards Asset Discovery and Visibility · 6 cards ICS Digital Forensics · 6 cards ICS Incident Response · 6 cards ICS Malware Analysis · 6 cards ICS Network Security Monitoring · 6 cards ICS Threat Intelligence · 6 cards Threat Hunting in ICS · 6 cards GRID ICS Vulnerability Management and Risk Assessment · 6 cards GRID ICS Vulnerability Management and Risk Assessment · 6 cards GRID ICS Vulnerability Management and Risk Assessment · 6 cards GRID OT and SCADA Protocol Security · 6 cards GRID OT and SCADA Protocol Security · 6 cards GRID OT and SCADA Protocol Security · 6 cards ICS Network Architecture & Defense Strategies · 6 cards ICS Specific Malware & Attack Techniques · 6 cards Incident Response in ICS Environments · 6 cards Industrial Control System Threat Detection & Monitoring · 6 cards

✍️ Sample GRID Questions & Answers

1. In ICS risk assessment, what does the term 'consequence severity' most directly refer to?

✓ The potential physical, safety, or operational impact if a vulnerability is exploited

Consequence severity in ICS risk assessment captures the physical harm, safety hazards, or operational disruption that could result from successful exploitation.

2. Which of the following is the BEST example of strategic threat intelligence for an ICS environment?

✓ A detailed report on the geopolitical motivations and long-term objectives of nation-state actors targeting the global energy sector.

Strategic threat intelligence focuses on the high-level, long-term view of the threat landscape. [7, 29] A report on the motivations, intent, and objectives of threat actors targeting a sector provides decision-makers (like CISOs and executives) with the context needed for long-term planning, risk management, and resource allocation. The other options are examples of tactical (IP addresses, Snort signature) or operational (TTP analysis) intelligence. [5, 7]

3. In IEC 62443, the term 'Target Security Level' (SL-T) is set by whom?

✓ The asset owner or operator based on risk assessment

The asset owner/operator determines the Target Security Level based on their own risk assessment of what level of security is required to protect the system against realistic threats in their environment.

4. Which protocol is commonly used in oil and gas pipeline SCADA systems and operates over serial lines using a master-slave architecture?

✓ Modbus RTU

Modbus RTU is a serial protocol widely deployed in oil and gas SCADA systems for communicating with remote sensors and actuators over RS-232/RS-485 links.

5. Which malware was specifically designed to target industrial control systems and manipulate PLCs?

✓ Stuxnet

Stuxnet was a highly sophisticated malicious computer worm discovered in 2010, specifically designed to target and manipulate industrial control systems. It famously targeted Siemens PLCs (Programmable Logic Controllers) used in Iran's nuclear program, causing physical damage to centrifuges by altering their operational speeds.

6. When an ICS environment must comply with both NERC CIP and IEC 62443, which approach best resolves overlapping requirements?

✓ Implement the stricter of the two requirements for each control area so both standards are simultaneously satisfied

Implementing the more stringent requirement in each area satisfies both frameworks simultaneously, since compliance with a stricter control inherently meets the less restrictive one—a common dual-compliance strategy.

🎯 Free GRID Practice Tests

ICS Security Standards and Compliance · 7 questions ICS Security Standards and Compliance · 7 questions ICS Security Standards and Compliance · 7 questions Incident Response in ICS Environments · 6 questions ICS Incident Response · 6 questions ICS Network Security Monitoring · 6 questions Active Defense in ICS · 6 questions ICS Threat Intelligence · 6 questions ICS Network Architecture & Defense Strategies · 6 questions Industrial Control System Threat Detection & Monitoring · 6 questions

📖 GRID Guides & Articles

Your GRID Study Path

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