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ISA/IEC 62443 Cybersecurity Fundamentals Specialist Sample Questions (Q109-Q114):

NEW QUESTION # 109
What does Layer 1 of the ISO/OSI protocol stack provide?
Available Choices (select all choices that are correct)

Answer: C


NEW QUESTION # 110
After receiving an approved patch from the JACS vendor, what is BEST practice for the asset owner to follow?

Answer: D

Explanation:
According to the ISA/IEC 62443 Cybersecurity Fundamentals Specialist resources, patches are software updates that fix bugs, vulnerabilities, or improve performance of a system. Patches are classified into three categories based on their urgency and impact: low, medium, and high. Low priority patches are those that have minimal or no impact on the system functionality or security, and can be applied at the next scheduled maintenance. Medium priority patches are those that have moderate impact on the system functionality or security, and should be applied within a reasonable time frame, such as three months. High priority patches are those that have significant or critical impact on the system functionality or security, and should be applied as soon as possible, preferably at the first unscheduled outage. Applying patches in a timely manner is a best practice for maintaining the security and reliability of an industrial automation and control system (IACS).
References:
* ISA/IEC 62443 Cybersecurity Fundamentals Specialist Study Guide, Section 4.3.2, Patch Management
* ISA/IEC 62443-2-1:2009, Security for industrial automation and control systems - Part 2-1:
Establishing an industrial automation and control systems security program, Clause 5.3.2.2, Patch management
* ISA/IEC 62443-3-3:2013, Security for industrial automation and control systems - Part 3-3: System security requirements and security levels, Clause 4.3.3.6.2, Patch management


NEW QUESTION # 111
Using the risk matrix below, what is the risk of a medium likelihood event with high consequence?

Answer: C

Explanation:
According to the ISA/IEC 62443 Cybersecurity Fundamentals, the risk matrix is a tool used to assess the risk of a particular event. The risk matrix is divided into three categories: likelihood, consequence, and risk. The likelihood is the probability that an event will occur, the consequence is the impact that the event will have, and the risk is the combination of the two. In this case, the risk of a medium likelihood event with high consequence is a high risk, as shown by the red cell in the matrix. References:
ISA/IEC 62443 Cybersecurity Fundamentals
[ISA/IEC 62443 Cybersecurity Certificate Program]
[Cybersecurity Library]
[Using the ISA/IEC 62443 Standard to Secure Your Control Systems]


NEW QUESTION # 112
Which of the following is a trend that has caused a significant percentage of security vulnerabilities?
Available Choices (select all choices that are correct)

Answer: A

Explanation:
One of the trends that has increased the security risks for industrial automation and control systems (IACS) is the integration of these systems with business and enterprise systems, such asenterprise resource planning (ERP), manufacturing execution systems (MES), and supervisory control and data acquisition (SCADA). This integration exposes the IACS to the same threats and vulnerabilities that affect the business and enterprise systems, such as malware, denial-of-service attacks, unauthorized access, and data theft. Moreover, the integration also creates new attack vectors and pathways for adversaries to compromise the IACS, such as through remote access, wireless networks, or third-party devices. Therefore, the integration of IACS with business and enterprise systems is a trend that has caused a significant percentage of security vulnerabilities. References: ISA/IEC 62443 Standards to Secure Your Industrial Control System, page 1-2.


NEW QUESTION # 113
Which of the following is an activity that should trigger a review of the CSMS?
Available Choices (select all choices that are correct)

Answer: A,C,D

Explanation:
According to the ISA/IEC 62443-2-1 standard, a review of the CSMS should be triggered by any changes that affect the cybersecurity risk of the industrial automation and control system (IACS), such as new technical controls, organizational restructuring, or security incidents1. Budgeting is not a trigger for CSMS review, unless it impacts the cybersecurity risk level or the CSMS itself2. References: 1: ISA/IEC 62443-2-1:2010, Section 4.3.3.3 2: A Practical Approach to Adopting the IEC 62443 Standards, ISAGCA Blog3


NEW QUESTION # 114
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