GIAC Response and Industrial Defense (GRID) Sample Questions:
1. Why is it critical to maintain visibility into third-party devices connected to an ICS network?
A) To improve social media presence
B) To ensure that third-party devices do not introduce new vulnerabilities or security risks to the network
C) To monitor employee activity
D) To reduce system load
2. Your organization has detected a significant increase in traffic between a Human-Machine Interface (HMI) and a remote system that is not part of the ICS network. The network intrusion detection system (NIDS) flagged this as a potential threat.
What steps should you take to mitigate this risk?
A) Increase the HMI's processing power
B) Ignore the traffic, as it could be a regular system update
C) Replace the HMI with a new device
D) Isolate the HMI from the network, investigate the source of the remote traffic, and apply access controls to prevent unauthorized communication
3. How can active defense help prevent the exploitation of known vulnerabilities in an ICS environment?
A) By continuously monitoring for attempts to exploit vulnerabilities and responding with automated mitigation actions
B) By ignoring vulnerability reports
C) By upgrading all systems to the latest versions immediately
D) By disabling all network connections
4. What is the main challenge when applying traditional IT active defense strategies to ICS environments?
A) ICS environments often have legacy systems and are more sensitive to disruptions caused by security mechanisms
B) ICS systems are more expensive
C) ICS systems have no user authentication
D) ICS environments do not require security
5. What type of attacks can be detected using active defense techniques in ICS environments?
A) Social engineering attacks only
B) Only physical attacks
C) Distributed Denial of Service (DDoS) attacks, insider threats, and unauthorized access
D) Phishing emails only
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: D | Question # 3 Answer: A | Question # 4 Answer: A | Question # 5 Answer: C |
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