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ISA ISA-IEC-62443 Exam Syllabus Topics:

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

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ISA/IEC 62443 Cybersecurity Fundamentals Specialist Sample Questions (Q165-Q170):

NEW QUESTION # 165
Which of the following are the critical variables related to access control?
Available Choices (select all choices that are correct)

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

Answer: D

NEW QUESTION # 166
Using the risk matrix below, what is the risk of a medium likelihood event with high consequence?

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

Answer: A

NEW QUESTION # 167
Which statement is TRUE regarding Intrusion Detection Systems (IDS)?
Available Choices (select all choices that are correct)

A. They require a small amount of care and feeding
B. Modern IDS recognize IACS devices by default.
C. They are very inexpensive to design and deploy.
D. They are effective against known vulnerabilities.

Answer: B

NEW QUESTION # 168
How can defense in depth be achieved via security zones?

A. By having zones within zones, or subzones, that provide layered security
B. By having zones that separate sensors from actuators, that provide layered security
C. By having a zone edge that is using the security policies of the asset owner
D. By having zones that are connected via using the latest version of SSL

Answer: A

Explanation:
Defense in depth is a core concept of ISA/IEC 62443, and security zones are a structural method to implement it. According to ISA/IEC 62443-3-2 and 62443-1-1, layering can be achieved by nesting zones - creating zones within zones (i.e., subzones) - to enhance protection through multiple barriers.
"Defense in depth is realized through segmentation into zones and conduits. A zone may contain subzones to establish additional layers of security, providing multiple barriers to intrusion."
- ISA/IEC 62443-3-2:2020, Clause 5.3.2 - Zone and Conduit Model
This layered zoning approach enables tiered security controls, reducing the impact of breaches and limiting lateral movement within a network.
References:
ISA/IEC 62443-3-2:2020 - Clause 5.3.2
ISA/IEC 62443-1-1:2007 - Security Zones and Conduits

NEW QUESTION # 169
Which service does an Intrusion Detection System (IDS) provide?

A. It blocks malicious activity in networks and computer systems.
B. It is the lock on the door for networks and computer systems.
C. It is effective against all vulnerabilities in networks and computer systems.
D. It detects attempts to break into or misuse a computer system.

Answer: D

Explanation:
An Intrusion Detection System (IDS) is a passive monitoring tool that detects unauthorized or malicious activity in networked systems. It does not block traffic (like an IPS), but rather alerts administrators to potential breaches.
"An IDS monitors network or system activities for malicious actions or policy violations and produces alerts or logs for analysis."
- ISA/IEC 62443-3-3:2013, SR 3.2 - Detection of Security Events
It's a core component of security monitoring and response - often paired with an Incident Response Plan (IRP) as defined in ISA/IEC 62443-2-1.
Clarification of Options:
Option A is metaphorical and not technically accurate.
Option B is false; IDS does not protect against all vulnerabilities.
Option C is incorrect; IDS does not block, only detects.
Option D is correct - it detects unauthorized access or misuse.
References:
ISA/IEC 62443-3-3:2013 - SR 3.2
ISA/IEC 62443-2-1:2010 - SP Element 7: Incident Response
NIST SP 800-94 - Guide to Intrusion Detection Systems

NEW QUESTION # 170
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