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GIAC Response and Industrial Defense (GRID)のよくある疑問を解決します

GIAC Response and Industrial Defense (GRID) 認定 GRID 試験問題：

問題 #1

Your organization has deployed an IDS in an ICS environment, and the system has generated an alert indicating unusual communication between a remote workstation and a programmable logic controller (PLC).
How should you proceed with investigating this issue?

A. Review the logs to identify the nature of the communication, verify if the workstation should have access to the PLC, and investigate the user's activity
B. Restart the PLC to reset its communication logs
C. Ignore the alert, as it could be a false positive
D. Disable the IDS system

問題 #2

What is the primary purpose of monitoring in an ICS environment?

A. To detect abnormal activities and potential security threats
B. To improve data encryption
C. To reduce energy consumption
D. To automate system backups

問題 #3

What role does threat intelligence play in reducing the likelihood of future attacks in ICS environments?

A. It reduces the cost of system hardware
B. It improves employee training
C. It helps organizations predict and prepare for emerging threats before they can exploit vulnerabilities
D. It increases energy efficiency

問題 #4

A manufacturing plant that relies on ICS systems for its production line receives an alert indicating that unauthorized access was attempted on one of its programmable logic controllers (PLCs).
What should be the first steps in handling this situation using active defense principles?

A. Review the system logs, investigate the unauthorized access attempt, isolate the PLC from the network, and enhance access controls to prevent further attempts
B. Ignore the alert and continue production
C. Shut down the entire production line immediately
D. Reset all passwords for the entire ICS system without investigation

問題 #5

What role do honeypots play in an active defense strategy for ICS environments?

A. They serve as backup systems in case of a failure
B. They automatically block all incoming traffic to ICS systems
C. They attract and deceive attackers, allowing security teams to study attacker behavior and gain insights into potential threats
D. They improve the performance of ICS networks

解説：