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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Access Control & Identity Management | 15% | - User authentication and authorization - Security policies and procedures - Role-based access control |
| Topic 2: Security Operations & Incident Response | 20% | - Incident handling and response processes - Monitoring, maintenance and continuous improvement - Cybersecurity Management System (CSMS) |
| Topic 3: Industrial Network Security | 30% | - Network segmentation and security architecture - Industrial protocols security - Threats, vulnerabilities and risk assessment |
| Topic 4: Security Fundamentals & ISA/IEC 62443 Framework | 20% | - Core security principles: CIA triad, defense-in-depth - Foundational security requirements - Zones and conduits model - Structure and parts of ISA/IEC 62443 standards |
| Topic 5: Industrial Automation and Control Systems (IACS) Overview | 15% | - Cybersecurity importance in industrial environments - IACS components, architectures and protocols - Differences between IT and OT security |
>> Question ISA-IEC-62443 Explanations <<
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NEW QUESTION # 141
Which is a reason for
and physical security regulations meeting a mixed resistance?
Available Choices (select all choices that are correct)
Answer: C
Explanation:
Cybersecurity and physical security regulations are intended to provide guidance and requirements for protecting industrial control systems from various threats and risks. However, these regulations may face mixed resistance from different stakeholders for various reasons. One of the reasons is that there are a limited number of enforced cybersecurity and physical security regulations, especially at the international level. This means that some regions or countries may have more stringent or comprehensiveregulations than others, creating inconsistencies and challenges for cross-border cooperation and compliance. Moreover, some regulations may be outdated or not aligned with the current best practices and standards, such as ISA/IEC
62443, which may limit their effectiveness and applicability. Therefore, some organizations may prefer to follow voluntary standards or frameworks, such as ISA/IEC 62443, rather than mandatory regulations, as they may offer more flexibility and adaptability to the specific needs and contexts of each industrial control system. References:
* ISA/IEC 62443 Standards to Secure Your Industrial Control System, page 3
* Using the ISA/IEC 62443 Standard to Secure Your Control System, page 9
NEW QUESTION # 142
What is the formula for calculating risk?
Answer: A
Explanation:
The formula for risk in ISA/IEC 62443 is typically expressed as:
Risk = Threat ร Vulnerability ร Consequence
This means that risk is a product of the likelihood that a threat will exploit a vulnerability and the impact (consequence) if that event occurs. This formula is consistently used in both the general information security domain and explicitly referenced in the ISA/IEC 62443-3-2 standard in the context of IACS risk assessments.
Reference: ISA/IEC 62443-3-2:2020, Section 5.2 ("Risk is typically calculated as Threat ร Vulnerability ร Consequence"); ISA/IEC 62443-2-1:2009, Section 5.2.4.
NEW QUESTION # 143
Which analysis method is MOST frequently used as an input to a security risk assessment?
Available Choices (select all choices that are correct)
Answer: C
Explanation:
A Process Hazard Analysis (PHA) is a systematic and structured method of identifying and evaluating the potential hazards and risks associated with an industrial process. A PHA can help to identify the possible causes and consequences of undesired events, such as equipment failures, human errors, cyberattacks, natural disasters, etc. A PHA can also provide recommendations for reducing the likelihood and severity of such events, as well as improving the safety and security of the process. A PHA is one of the most frequently used analysis methods as an input to a security risk assessment, as it can help to identify the assets, threats, vulnerabilities, and impacts related to the process, and provide a basis for determining the security risk level and the appropriate security countermeasures. A PHA is also a requirement of the ISA/IEC 62443 standard, as part of the security program development and implementation phase12. References: 1: ISA/IEC 62443-2-1:
Security for industrial automation and control systems: Establishing an industrial automation and control systems security program 2: ISA/IEC 62443-3-2: Security for industrial automation and control systems:
Security risk assessment for system design
NEW QUESTION # 144
Which statement is TRUE reqardinq application of patches in an IACS environment?
Available Choices (select all choices that are correct)
Answer: B
Explanation:
Patches are software updates that fix bugs, vulnerabilities, or improve performance or functionality. Patches are important for maintaining the security and reliability of an IACS environment, but they also pose some challenges and risks. Applying patches in an IACS environment is not as simple as in an IT environment, because patches may affect the availability, integrity, or safety of the IACS. Therefore, patches should not be applied blindly or automatically, but based on the organization's risk assessment. The risk assessment should consider the following factors: 1 The severity and likelihood of the vulnerability that the patch addresses The impact of the patch on the IACS functionality and performance The compatibility of the patch with the IACS components and configuration The availability of a backup or recovery plan in case the patch fails or causes problems The testing and validation of the patch before applying it to the production system The communication and coordination with the stakeholders involved in the patching process The documentation and auditing of the patching activities and results References: ISA TR62443-2-3 - Security for industrial automation and control systems, Part 2-3: Patch management in the IACS environment
NEW QUESTION # 145
What is recommended to use between the plant floor and the rest of the company networks?
Answer: C
Explanation:
ISA/IEC 62443 recommends using a firewall to segment and protect the plant floor (Operational Technology or OT network) from the rest of the company's Information Technology (IT) networks. Firewalls enforce security policies by controlling and monitoring traffic, helping to prevent unauthorized access and potential threats from traversing between business and control networks. Hubs and switches do not provide security; routers may offer some basic filtering, but firewalls are explicitly designed for this purpose.
Reference: ISA/IEC 62443-3-3:2013, Section 4.2.3 (Use of network segmentation and firewalls); ISA/IEC
62443-3-2:2020, Section 4.4 (Zones and Conduits).
NEW QUESTION # 146
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