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| Section | Objectives |
|---|---|
| ICS Incident Response and Recovery | - Recovery and Continuity
|
| ICS Security Architecture and Defense | - Defense-in-Depth Strategies
|
| ICS Components, Architecture, and Protocols | - ICS Overview and Concepts
|
| ICS Governance, Policy, and Compliance | - Standards and Compliance
|
| ICS Threats, Vulnerabilities, and Risk Management | - Threat Landscape and Threat Modeling
|
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NEW QUESTION # 50
Which type of device is the following configuration setting from?
deny modbus function write-multiple-holdingregisters
Answer: B
Explanation:
The configuration line denies a specific Modbus function code, which is a command-level filter for industrial protocols.
This type of control is typical of an application firewall (D) designed to understand and filter industrial control system protocols at the application layer.
A network firewall (A) typically filters traffic based on IP addresses, ports, and protocols, but not protocol function codes.
NIDS (B) detects and alerts on suspicious traffic but does not usually enforce blocking rules.
SIEM (C) collects and analyzes logs, not real-time blocking.
GICSP emphasizes the role of application-layer firewalls in protecting ICS protocols like Modbus.
Reference:
GICSP Official Study Guide, Domain: ICS Security Architecture & Design
NIST SP 800-82 Rev 2, Section 5.5 (Application Layer Security)
GICSP Training on ICS Protocol Security Controls
NEW QUESTION # 51
What kind of data could be found on a historian?
Answer: D
Explanation:
An industrial historian is a specialized database system designed to collect, store, and retrieve time-series data from industrial control systems. It primarily stores process data, event logs, and measurements over time, which are essential for trend analysis, reporting, and regulatory compliance.
Historian data is often used for billing purposes (A), especially in utilities and process industries, where consumption data is recorded and later used to generate customer bills.
Option (B), real-time supervision of lower-level controllers, is typically handled by SCADA or control system software, not the historian itself.
(C) Diagrams are stored in engineering tools or documentation repositories, not historians.
(D) Runtime libraries are software components and not stored on historians.
The GICSP curriculum clarifies that historians are central to operational analytics and long-term data storage but are not real-time control systems themselves.
Reference:
GICSP Official Study Guide, Domain: ICS Fundamentals & Architecture
NIST SP 800-82 Rev 2, Section 6.3 (Data Historians and Data Acquisition) GICSP Training Materials on ICS Data Management
NEW QUESTION # 52
What mechanism could help defeat an attacker's attempt to hide evidence of his/her actions on the target system?
Answer: B
Explanation:
An attacker often tries to cover their tracks by deleting or modifying logs on the compromised system to hide evidence of their activities.
Centralized logging (D) forwards log data in real-time or near real-time to a secure, remote logging server that the attacker cannot easily alter or delete. This makes it much more difficult for attackers to erase their footprints because even if local logs are tampered with, copies remain intact elsewhere.
Attack surface analysis (A) is a proactive security activity to identify vulnerabilities, not a forensic or logging mechanism.
Application allow lists (B) control what software can execute but do not directly preserve evidence of actions taken.
Sandboxing (C) isolates processes for security testing but is unrelated to preserving evidence.
The GICSP materials emphasize centralized logging and secure log management as critical controls for incident detection and forensic analysis within ICS environments.
Reference:
GICSP Official Study Guide, Domain: ICS Security Operations & Incident Response NIST SP 800-92 (Guide to Computer Security Log Management) GICSP Training on Incident Response and Logging Best Practices
NEW QUESTION # 53
Which of the following methods is best for securing endpoints in a mixed Windows and Unix ICS environment?
Response:
Answer: D
NEW QUESTION # 54
Which of the following devices is most likely to be in the same level as an HMI workstation that interfaces with a PLC?
Answer: D
Explanation:
In the Purdue model, HMIs typically reside at Level 2 (Supervisory Control), providing interfaces for operators to monitor and control devices. Remote Terminal Units (RTUs) (D) also commonly reside at this level, interfacing between controllers and supervisory systems.
Variable speed drives (A) and PLCs (B) are usually located at Level 1 (Control Devices LAN).
Data historians (C) typically reside at Level 3 or higher in the Operations Support DMZ or enterprise network.
GICSP materials emphasize proper classification of devices by Purdue levels for effective network segmentation and security.
Reference:
GICSP Official Study Guide, Domain: ICS Fundamentals & Architecture
Purdue Model and Network Segmentation, IEC 62443
GICSP Training on ICS Network Architecture
NEW QUESTION # 55
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