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[General] ISA ISA-IEC-62443 Valid Mock Exam - Exam ISA-IEC-62443 Passing Score

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【General】 ISA ISA-IEC-62443 Valid Mock Exam - Exam ISA-IEC-62443 Passing Score

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ISA/IEC 62443 Cybersecurity Fundamentals Specialist Sample Questions (Q210-Q215):NEW QUESTION # 210
Which is a PRIMARY reason why network security is important in IACS environments?
Available Choices (select all choices that are correct)
  • A. PLCs use serial or Ethernet communications methods.
  • B. PLCs under cyber attack can have costly and dangerous impacts.
  • C. PLCs are programmed using ladder logic.
  • D. PLCs are inherently unreliable.
Answer: B
Explanation:
Network security is important in IACS environments because PLCs, or programmable logic controllers, are devices that control physical processes and equipment in industrial settings. PLCs under cyber attack can have costly and dangerous impacts, such as disrupting production, damaging equipment, compromising safety, and harming the environment. Therefore, network security is essential to protect PLCs and other IACS components from unauthorized access, modification, or disruption. The other choices are not primary reasons why network security is important in IACS environments. PLCs are not inherently unreliable, but they can be affected by environmental factors, such as temperature, humidity, and electromagnetic interference. PLCs are programmed using ladder logic, which is a graphical programming language that resembles electrical schematics. PLCs use serial or Ethernet communications methods, depending on the type and age of the device, to communicate with other IACS components, such as human-machine interfaces (HMIs), supervisory control and data acquisition (SCADA) systems, and distributed control systems (DCSs). References:
* ISA/IEC 62443 Standards to Secure Your Industrial Control System training course1
* ISA/IEC 62443 Cybersecurity Fundamentals Specialist Study Guide2
* Using the ISA/IEC 62443 Standard to Secure Your Control Systems3

NEW QUESTION # 211
Which of the following is an example of separation of duties as a part of system development and
maintenance?
Available Choices (select all choices that are correct)
  • A. Developers write and then test their own code.
  • B. Changes are approved by one party and implemented by another.
  • C. Design and implementation are performed by the same team.
  • D. Configuration settings are made by one party and self-reviewed using a checklist.
Answer: B

NEW QUESTION # 212
What is one reason why IACS systems are highly vulnerable to attack?
  • A. They use the latest software updates regularly.
  • B. They often have unpatched software.
  • C. They are isolated from all networks.
  • D. They do not require patches.
Answer: B
Explanation:
Many Industrial Automation and Control Systems (IACS) are vulnerable because they run legacy software and are rarely patched, due to operational constraints like uptime requirements and fear of system disruption.
"IACS systems are often vulnerable due to the presence of legacy components, limited patching, and prolonged system lifespans without updates."
- ISA/IEC 62443-2-1:2010, Clause 4.4.3 - Patch Management
They are not always isolated (due to remote access, IIoT, etc.), and do not regularly implement the latest updates like IT systems.
References:
ISA/IEC 62443-2-1:2010 - Patch Management
ISA/IEC 62443-2-3:2015 - Patch Assessment and Deployment Challenges

NEW QUESTION # 213
What does the abbreviation CSMS round in ISA 62443-2-1 represent?
Available Choices (select all choices that are correct)
  • A. Cyber Security Monitoring System
  • B. Cyber Security Management System
  • C. Control System Monitoring System
  • D. Control System Management System
Answer: B
Explanation:
The abbreviation CSMS stands for Cyber Security Management System in ISA 62443-2-1. This standard defines the elements necessary to establish a CSMS for industrial automation and control systems (IACS) and provides guidance on how to develop those elements123. A CSMS is a collection of policies, procedures, practices, and personnel that are responsible for ensuring the security of IACS throughout their lifecycle24. References: 1: ISA/IEC 62443 Series of Standards - ISA 2: ISA 62443-2-1 - Security for industrial automation and control systems, Part 2-1: Establishing an Industrial Automation and Control Systems Security Program | GlobalSpec 3: IEC 62443-2-1:2010 | IEC Webstore | cyber security, smart city 4: Structuring the ISA/IEC 62443 Standards - ISAGCA

NEW QUESTION # 214
What is the primary goal of the Assess phase in the IACS Cybersecurity Lifecycle?
  • A. To implement countermeasures
  • B. To ensure the Achieved Security Level (SL-A) meets the Target Security Level (SL-T)
  • C. To conduct periodic audits
  • D. To assign a Target Security Level (SL-T)
Answer: D
Explanation:
In the Assess phase of the IACS Cybersecurity Lifecycle (as defined in ISA/IEC 62443-2-1 and 62443-3-2), the main objective is to identify assets, analyze risks, and assign a Target Security Level (SL-T) for each zone or conduit. This sets the foundation for design and implementation decisions. Achieving or verifying the SL- A (Achieved Security Level) occurs later in the lifecycle, after implementation.
Reference: ISA/IEC 62443-2-1:2009, Section 5.2; ISA/IEC 62443-3-2:2020, Section 5 ("Risk assessment and SL-T assignment").

NEW QUESTION # 215
......
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