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ISA ISA-IEC-62443 Exam Syllabus Topics:

Section	Objectives
Topic 1: Risk and Security Management	- Security lifecycle management in industrial systems - Risk assessment principles
Topic 2: Introduction to Industrial Cybersecurity	- Overview of IT vs OT security concepts - Fundamentals of cybersecurity in industrial environments
Topic 3: ISA/IEC 62443 Framework Overview	- Structure and purpose of IEC 62443 standards - Key terminology and concepts (zones, conduits, security levels)
Topic 4: Policies, Procedures, and Governance	- Compliance and governance considerations - Security policies for industrial control systems
Topic 5: Industrial Network and System Security	- Network segmentation and architecture security - Asset identification and protection

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ISA/IEC 62443 Cybersecurity Fundamentals Specialist Sample Questions (Q143-Q148):

NEW QUESTION # 143
Which of the following are the critical variables related to access control?
Available Choices (select all choices that are correct)

A. Password strength and change frequency
B. Reporting and monitoring
C. Account management and monitoring
D. Account management and password strength

Answer: D

NEW QUESTION # 144
Which is the BEST practice when establishing security zones?
Available Choices (select all choices that are correct)

A. Security zones should contain assets that share common security requirements.
B. Security zones should align with physical network segments.
C. Assets within the same logical communication network should be in the same security zone.
D. All components in a large or complex system should be in the same security zone.

Answer: A

NEW QUESTION # 145
Who must be included in a training and security awareness program?
Available Choices (select all choices that are correct)

A. Vendors and suppliers
B. Employees
C. All personnel
D. Temporary staff

Answer: C

Explanation:
Modbus over Ethernet, also known as Modbus/TCP, is a protocol that encapsulates the Modbus/RTU data string inside the data section of the TCP frame. It then sets up a client/server exchange between nodes, using TCP/IP addressing to establish connections1. This makes it easy to manage in a firewall, because the firewall can filter the traffic based on the source and destination IP addresses and the TCP port number. The default TCP port for Modbus/TCP is 502, but it can be changed if needed. Modbus/TCP does not use any other ports or protocols, so the firewall rules can be simple and specific. References:
* 8: Open Modbus/TCP Specification, RTA Automation, 2010.
* [9]: Modbus Application Protocol Specification V1.1b3, Modbus Organization, 2012.

NEW QUESTION # 146
Which is the PRIMARY responsibility of the network layer of the Open Systems Interconnection (OSI)
model?
Available Choices (select all choices that are correct)

A. Handles the physics of getting a message from one device to another
B. Gives transparent transfer of data between end users
C. Provides the rules for framing, converting electrical signals to data
D. Forwards packets, including routing through intermediate routers

Answer: D

NEW QUESTION # 147
What type of malware disrupted an emergency shutdown capability in safety systems?

A. Stuxnet
B. Zeus
C. Triton or Trisis
D. WannaCry

Answer: C

Explanation:
The Triton (also known as Trisis) malware specifically targeted and compromised Safety Instrumented Systems (SIS), disabling the emergency shutdown capabilities at a petrochemical plant. This attack demonstrated that safety systems, once considered isolated and secure, are vulnerable to sophisticated, targeted cyberattacks. Neither Zeus, Stuxnet, nor WannaCry had this specific impact on emergency shutdown safety systems.
Reference: ISA/IEC 62443-1-1:2007, Section 3.2.4; ISA/IEC 62443-3-3:2013, Section 4.2.2; Public incident reports and analyses of the Triton/Trisis attack (e.g., FireEye 2017 case study).

NEW QUESTION # 148
......

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