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| Section | Objectives |
|---|---|
| ICS Incident Response and Recovery | - Detection and Analysis
|
| ICS Threats, Vulnerabilities, and Risk Management | - Vulnerabilities and Attack Surfaces
|
| ICS Security Architecture and Defense | - Defense-in-Depth Strategies
|
| ICS Governance, Policy, and Compliance | - Standards and Compliance
|
| ICS Components, Architecture, and Protocols | - Communications and Protocols
|
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NEW QUESTION # 97
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?
Answer: A
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 # 98
Which ICS-specific protocol was designed to allow efficient communication between field devices and control systems while minimizing bandwidth usage?
Response:
Answer: D
NEW QUESTION # 99
Which type of process is described below?
A fementor's glycol jacket must maintain a steady temperature during and between batches of beer.
Answer: D
Explanation:
The process described involves maintaining a consistent condition during and between batches of production, characteristic of a batch process.
Batch processes are executed in defined quantities or lots where the process starts, runs for a set time, and then stops or resets for the next batch. The fermentor's glycol jacket temperature must be carefully controlled throughout the batch to ensure product quality.
Continuous processes (A) run nonstop with steady-state conditions, typical in chemical refineries but not in batch fermentation.
Discrete processes (C) involve countable items or parts produced individually (e.g., manufacturing of assembled products).
Manual (B) refers to human-driven control rather than an automated process type.
Batch processing is common in brewing and food industries and is covered in GICSP's ICS Fundamentals and Operations domain, which differentiates process types to tailor cybersecurity strategies for control systems.
Reference:
GICSP Official Study Guide, Domain: ICS Fundamentals & Operations
ISA-88 Batch Control Standard (referred in GICSP)
GICSP Training on Process Types and Control Strategies
NEW QUESTION # 100
Which of the following types of network devices sends traffic only to the intended recipient node?
Answer: B
Explanation:
An Ethernet switch (C) is a network device that learns the MAC addresses of connected devices and forwards packets only to the port associated with the destination node, reducing unnecessary traffic and improving security and efficiency.
An Ethernet hub (A) broadcasts incoming packets to all ports, not selectively.
A wireless access point (B) broadcasts signals to multiple wireless clients within range.
A wireless bridge (D) connects two network segments wirelessly but forwards traffic according to device types, not necessarily selectively to single nodes.
GICSP's ICS network segmentation and architecture domain underline the use of switches to limit broadcast traffic and reduce attack surfaces.
Reference:
GICSP Official Study Guide, Domain: ICS Security Architecture & Design
NIST SP 800-82 Rev 2, Section 5.5 (Network Architecture)
GICSP Training on Network Devices and Traffic Management
NEW QUESTION # 101
Which of the following would use round-robin process scheduling?
Answer: D
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 # 102
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