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Valid GICSP Test Duration | Valid GICSP Exam Guide

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Quiz 2025 GICSP: Global Industrial Cyber Security Professional (GICSP) – Valid Valid Test Duration

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GIAC Global Industrial Cyber Security Professional (GICSP) Sample Questions (Q30-Q35):

NEW QUESTION # 30
For application-aware firewalls filtering traffic between trust zones, which of the following policies should be applied to a packet that doesn't match an existing rule?

A. Application allow list
B. Application deny list
C. Default deny
D. Default alert

Answer: C

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
In the context ofIndustrial Control Systems (ICS)andOT network security, the principle of least privilege and explicit access control is fundamental for protecting critical infrastructure assets. According to the GICSP framework, when usingapplication-aware firewallsbetween different trust zones (e.g., corporate network to OT network), any traffic that doesnot explicitly match a defined ruleshould be blocked by default. This is referred to as the"default deny" policy.
* Default denymeans that unless traffic is explicitly allowed by firewall rules, it should be denied. This ensures that no unknown or unauthorized packets traverse trust boundaries, reducing the attack surface significantly.
* Thedefault alertoption (A) is useful for monitoring but does not prevent unauthorized access, so it's insufficient as a security control.
* Application deny list(C) andapplication allow list(D) refer to sets of permitted or denied applications, but the firewall still needs an overarching policy to handle unmatched packets; that policy must be deny for safety.
This approach is emphasized in theICS Security Architecture and Network Segmentationdomain of GICSP, reinforcing that all unknown or unexpected network traffic should be blocked unless explicitly permitted by policy. This aligns withNIST SP 800-82 Rev 2guidance on ICS security, which GICSP incorporates.
Reference:
Global Industrial Cyber Security Professional (GICSP) Official Study Guide, Domain: ICS Security Architecture & Design NIST SP 800-82 Rev 2: Guide to Industrial Control Systems (ICS) Security, Section 5.5 (Network Architecture) GICSP Training Materials, Firewall & Network Segmentation Best Practices Module

NEW QUESTION # 31
Which of the following would use round-robin process scheduling?

A. Temperature sensor in the field
B. Embedded device on the plant floor
C. Operator workstation in the control room
D. Data-diode at an enforcement boundary

Answer: C

Explanation:
Round-robin scheduling is a common time-sharing CPU scheduling algorithm used in general-purpose operating systems to allocate processor time fairly among processes.
An operator workstation (C) typically runs a general-purpose OS (like Windows), which uses round-robin or similar scheduling algorithms.
Embedded devices (A, B) often use real-time operating systems (RTOS) with priority-based or deterministic scheduling.
A data diode (D) is a hardware device and does not use process scheduling.
GICSP discusses scheduling differences in the context of embedded and general-purpose systems.
Reference:
GICSP Official Study Guide, Domain: ICS Fundamentals & Architecture
Real-Time Operating Systems vs General-Purpose OS
GICSP Training on ICS Device Architectures

NEW QUESTION # 32
An attacker has a goal of obtaining information stored in an ICS. Why might the attacker focus his efforts on the operating system rather than the ICS application?

A. The ICS is more likely to have vendor-provided security hardening guidance than the operating system will
B. Control of the operating system offers access to applications running on it
C. The operating system will have fewer vulnerabilities than the ICS application
D. Organizations generally do not define a role or responsibility for dealing with operating systems, leaving them neglected and vulnerable

Answer: B

Explanation:
In ICS environments, attackers often target the operating system (OS) rather than the ICS application itself because the OS controls and supports the applications running on it. Gaining control over the OS gives attackers the capability to:
Access all files and data processed by applications
Install malware or tools that operate beneath or alongside ICS applications Manipulate or intercept data without detection While hardening guidance may exist for both OS and applications, the OS is a more fundamental layer and usually presents a broader attack surface. Therefore, controlling the OS (D) effectively provides access to all applications, making it a strategic target for attackers seeking sensitive information.
This approach aligns with the GICSP's focus on understanding layered defenses and attack vectors at all levels of the ICS stack, including the operating system.
Reference:
GICSP Official Study Guide, Domain: ICS Security Architecture & Design
NIST SP 800-82 Rev 2, Section 5.6 (System and Communication Protection) GICSP Training Module on OS Hardening and ICS Attack Vectors

NEW QUESTION # 33
What kind of data could be found on a historian?

A. Information for supervising lower-level controllers in real-time
B. Information needed for billing customers
C. Diagrams depicting an overview of the process
D. Runtime libraries that software programs use

Answer: B

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 # 34
During a plant upgrade an architect needs to connect legacy lEDs to a new TCP/IP instrumentation LAN. The lEDs only have RS-232 communication interfaces available. What would best be used to connect the lEDs?

A. Data diode
B. Industrial switch
C. Communications Gateway
D. Engineering workstation

Answer: C

Explanation:
Legacy devices using RS-232 interfaces require a communications gateway (C) to translate between the serial communication protocol and the new TCP/IP network.
A data diode (A) is a unidirectional security device, not a protocol translator.
An engineering workstation (B) is a computer, not a protocol conversion device.
An industrial switch (D) operates at the Ethernet layer and does not perform protocol conversion.
GICSP emphasizes gateways as essential for integrating legacy ICS devices into modern IP networks while maintaining protocol integrity.
Reference:
GICSP Official Study Guide, Domain: ICS Fundamentals & Architecture
NIST SP 800-82 Rev 2, Section 3.4 (Legacy Protocol Integration)
GICSP Training on ICS Network Architecture and Protocols

NEW QUESTION # 35
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