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Free PDF Quiz 2025 Perfect ISA ISA-IEC-62443: Exam ISA/IEC 62443 Cybersecurity Fundamentals Specialist Simulator Online

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Posted on: 02/22/25

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ISA/IEC 62443 Cybersecurity Fundamentals Specialist Sample Questions (Q15-Q20):

NEW QUESTION # 15
What is the name of the missing layer in the Open Systems Interconnection (OSI) model shown below?

  • A. Control
  • B. Protocol
  • C. User
  • D. Transport

Answer: D

Explanation:
The Open Systems Interconnection (OSI) model is a framework that describes the functions of a networking system. The OSI model categorizes the computing functions of the different network components, outlining the rules and requirement needed to support the interoperability of the software and hardware that make up the network1.
The OSI model consists of seven abstraction layers arranged in a top-down order: Physical, Data Link, Network, Transport, Session, Presentation, and Application. The Transport layer is the fourth layer in the OSI model, and it is responsible for ensuring reliable and efficient data transfer between the Network layer and the Session layer2. The Transport layer uses protocols such as Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) to provide end-to-end communication services, such as error detection and correction, flow control, congestion control, and segmentation2.
The image that you sent shows a 3D representation of the OSI model, with the layers stacked on top of each other. The missing layer is the Transport layer, which isrepresented by a pink box with a white arrow pointing to it. The arrow is labeled "TCP, UDP".
1: What is the OSI Model? 7 Network Layers Explained | Fortinet 2: What is OSI Model | 7 Layers Explained
- GeeksforGeeks


NEW QUESTION # 16
Which factor drives the selection of countermeasures?
Available Choices (select all choices that are correct)

  • A. System design
  • B. Security levels
  • C. Foundational requirements
  • D. Output from a risk assessment

Answer: D


NEW QUESTION # 17
Which is the implementation of PROFIBUS over Ethernet for non-safetv-related communications?
Available Choices (select all choices that are correct)

  • A. PROFIBUS DP
  • B. PROFINET
  • C. PROF1SAFE
  • D. PROFIBUS PA

Answer: B


NEW QUESTION # 18
Using the risk matrix below, what is the risk of a medium likelihood event with high consequence?

  • A. Option A
  • B. Option C
  • C. Option D
  • D. Option B

Answer: D


NEW QUESTION # 19
Which of the following is an element of security policy, organization, and awareness?
Available Choices (select all choices that are correct)

  • A. Technical requirement assessment
  • B. Product development requirements
  • C. Penetration testing
  • D. Staff training and security awareness

Answer: D

Explanation:
According to the ISA/IEC 62443-2-1 standard, security policy, organization, and awareness is one of the four foundational requirements for an IACS security management system. It defines the "policies, procedures, and organizational structure necessary to support the security program" 1. One of the elements of this requirement is staff training and security awareness, which involves "providing appropriate security education and training to all personnel who have access to or are responsible for IACS components" 1. This element aims to ensure that the staff are aware of the security risks, policies, and procedures, and are able to perform their roles and responsibilities in a secure manner. Staff training and security awareness can include topics such as security principles, threats and vulnerabilities, incident response, password management, physical security, and social engineering 2. References:
* ISA/IEC 62443 Series of Standards - ISA
* Security of Industrial Automation and Control Systems - ISAGCA


NEW QUESTION # 20
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