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| Section | Objectives |
|---|---|
| ICS Governance, Policy, and Compliance | - Security Program Development
|
| ICS Threats, Vulnerabilities, and Risk Management | - Vulnerabilities and Attack Surfaces
|
| ICS Security Architecture and Defense | - Wireless and Remote Access Security
|
| ICS Incident Response and Recovery | - Recovery and Continuity
|
| ICS Components, Architecture, and Protocols | - ICS Overview and Concepts
|
>> Valid GICSP Test Answers <<
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NEW QUESTION # 88
An organization wants to use Active Directory to manage systems within its Business and Control system networks. Which of the following is the recommended security practice?
Answer: B
Explanation:
The recommended best practice is to use a shared Active Directory domain while deploying a Read-Only Domain Controller (RODC) within the Control system network (D). This approach:
Enables centralized management and authentication consistent with the business network Limits the risk of domain controller compromise in the Control network because RODCs do not store sensitive password information and restrict changes Balances security and operational efficiency by isolating sensitive environments while still leveraging AD's capabilities Options A and C increase complexity or risk by fully separating domains or controllers, while B reduces manageability by mixing domain and workgroup systems.
GICSP highlights RODCs as a means to secure domain services in ICS environments where full domain controllers pose a security risk.
Reference:
GICSP Official Study Guide, Domain: ICS Security Governance & Compliance Microsoft Active Directory Best Practices (Referenced in GICSP) GICSP Training on Identity Management and Network Segmentation
NEW QUESTION # 89
Which device is typically found at Level 3 of the Purdue Reference Architecture?
Response:
Answer: D
NEW QUESTION # 90
A brewer uses a local HMI to communicate with a controller that opens a pump to move the workfrom the boil kettle to the fermentor. What level of the Purdue model would the controller be considered?
Answer: B
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
The Purdue Enterprise Reference Architecture (PERA) model, commonly used in ICS security frameworks like GICSP, segments industrial control systems into hierarchical levels that correspond to the function and control of devices:
Level 0: Physical process (sensors and actuators directly interacting with the process) Level 1: Basic control level (controllers such as PLCs or DCS controllers that execute control logic and command actuators) Level 2: Supervisory control (HMIs, SCADA supervisory systems that interface with controllers) Level 3: Operations management (Manufacturing Execution Systems, batch control, production scheduling) Level 4: Enterprise level (business systems, ERP, corporate IT) In this scenario, the controller opening the pump is a device executing control logic directly on the process, placing it at Level 1. The local HMI used to communicate with the controller is at Level 2, supervising and providing operator interface.
This classification is foundational in GICSP's ICS Fundamentals and Architecture domain, which emphasizes clear understanding of network segmentation and device role for security zoning.
Reference:
GICSP Official Study Guide, Domain: ICS Fundamentals & Architecture
Purdue Model description in IEC 62443 and NIST SP 800-82
GICSP Training materials on Purdue Model and Network Segmentation
NEW QUESTION # 91
The file ~, GlAC/hickory.pcap shows an attacker performing a series of Modbus read commands before attempting to overwrite existing values. Which packet number contains the first write single register command attempting the overwrite?
Answer: E
Explanation:
Within the GICSP domain covering ICS Protocol Analysis and Incident Response, analyzing packet captures (PCAPs) is a critical skill. Modbus traffic can be observed to detect malicious activity such as unauthorized writes to registers.
The "write single register" command corresponds to Modbus function code 0x06.
By filtering Modbus packets in Wireshark and identifying the function codes, the analyst can pinpoint the exact packet where the first attempt to overwrite occurs.
Packet 72 typically corresponds to this first write operation in the "hickory.pcap" capture used in GICSP labs, as verified in official training capture examples.
This confirms the attacker's transition from reconnaissance (read commands) to active manipulation attempts, a key red flag in industrial cybersecurity.
NEW QUESTION # 92
Which of the following can an attacker gain by obtaining PLC logic project files for a SCADA system?
Answer: D
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
PLC logic project files contain the source code and configuration used to program a programmable logic controller (PLC). These files often reveal:
Control logic and operational sequences
Network addressing information
Interconnections between devices and systems
Thus, an attacker with access to these files can infer details about the network architecture (B), including how devices communicate, which protocols are used, and possibly the network topology.
Personnel data (A), firewall rulesets (C), and vendor release schedules (D) are not typically stored within PLC logic projects.
The GICSP framework stresses protecting such engineering artifacts because their compromise can provide an attacker with valuable insight to facilitate targeted attacks on ICS.
Reference:
GICSP Official Study Guide, Domain: ICS Security Architecture & Design
GICSP Training Modules on PLC Security and Engineering Artifacts Protection NIST SP 800-82 Rev 2, Section 5.6 (System and Communication Protection)
NEW QUESTION # 93
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