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Which activity is part of establishing policy, organization, and awareness?
Available Choices (select all choices that are correct)
A. Establish the risk tolerance.
B. Communicate policies.
C. Implement countermeasures.
D. Identify detailed vulnerabilities.
Answer: B
NEW QUESTION # 137
After receiving an approved patch from the JACS vendor, what is BEST practice for the asset owner to follow?
A. If no problems are experienced with the current IACS, it is not necessary to apply the patch.
B. If a high priority, apply the patch at the first unscheduled outage.
C. If a low priority, there is no need to apply the patch.
D. If a medium priority, schedule the installation within three months after receipt.
Answer: B
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 # 138
A manufacturing plant is developing a cybersecurity plan for its IACS that must evolve as new threats emerge and system changes occur. Which document should serve as the foundation for this evolving security approach?
A. Corporate KPIs unrelated to IACS
B. Security Protection Scheme (SPS)
C. Security Program (SP) portfolio
D. IEC 62443-2-2 only
Answer: C
Explanation:
The Security Program (SP) portfolio, described in IEC 62443-2-1, is the cornerstone for an organization's cybersecurity management for Industrial Automation and Control Systems (IACS). It provides a structured, documented, and dynamic security management approach that evolves as system configurations change and new threats emerge.
IEC 62443-2-1, Clause 4.1.3 states:
"The organization shall develop and maintain a cyber security management system (CSMS) as part of its overall security program. The CSMS provides a systematic approach to defining, implementing, and maintaining policies, procedures, and practices necessary to protect IACS assets." Furthermore, Clause 4.2 emphasizes:
"The security program shall be continually updated based on changes in the threat environment, vulnerabilities, or changes to the organization's IACS assets or systems." The SP portfolio includes the Cybersecurity Management System (CSMS), policies, procedures, roles, responsibilities, and improvement mechanisms. This allows continuous adaptation to evolving cybersecurity requirements.
Incorrect Options:
A). IEC 62443-2-2 only - While it focuses on implementation of security capabilities for asset owners, it does not represent the full foundation for a dynamic and evolving security plan.
C). Corporate KPIs unrelated to IACS - Irrelevant to cybersecurity planning for IACS.
D). Security Protection Scheme (SPS) - Related to zone and conduit security design (IEC 62443-3-2), but not the strategic, evolving program foundation.
References:
ISA/IEC 62443-2-1:2010 - "Security for Industrial Automation and Control Systems - Establishing an IACS Security Program" Official ISA/IEC 62443 Study Guide
NEW QUESTION # 139
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. PROFIBUS PA
D. PROF1SAFE
Answer: B
NEW QUESTION # 140
Why is patch management more difficult for IACS than for business systems?
Available Choices (select all choices that are correct)
A. Business systems automatically update.
B. Many more approvals are required.
C. Overtime pay is required for technicians.
D. Patching a live automation system can create safety risks.
Answer: D
Explanation:
Patch management is the process of applying software updates to fix security vulnerabilities, improve functionality, or enhance performance. Patch management is an essential part of cybersecurity, as unpatched systems can be exploited by malicious actors. However, patch management for industrial automation and control systems (IACS) is more challenging than for business systems, because patching a live automation system can create safety risks. According to the ISA/IEC 62443 standards, patching an IACS may have the following potential impacts1:
* Patching may introduce new vulnerabilities or errors that compromise the availability, integrity, or confidentiality of the IACS.
* Patching may affect the functionality or performance of the IACS, causing unexpected or undesired behavior, such as process shutdowns, slowdowns, or failures.
* Patching may require downtime or reduced operation of the IACS, which may affect production, quality, or profitability.
* Patching may require additional resources, such as personnel, equipment, or testing facilities, which may not be readily available or affordable.
Therefore, patch management for IACS requires careful planning, testing, and validation before applying patches to the operational environment. The ISA/IEC 62443 standards provide guidance and best practices for patch management in the IACS environment, such as1:
* Establishing a patch management program that defines roles, responsibilities, policies, and procedures
* for patching IACS components and systems.
* Identifying and prioritizing the IACS assets that need patching, based on their criticality, vulnerability, and risk level.
* Evaluating and verifying the patches for compatibility, functionality, and security before applying them to the IACS.
* Implementing and documenting the patching process, including backup, recovery, and rollback procedures, in case of patch failure or adverse effects.
* Monitoring and auditing the patching activities and outcomes, and reporting any issues or incidents.
References: 1: ISA TR62443-2-3 - Security for industrial automation and control systems, Part 2-3: Patch management in the IACS environment
NEW QUESTION # 141
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