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| Section | Weight | Objectives |
|---|---|---|
| Industrial Network Security | 30% | - Network segmentation and security architecture - Industrial protocols security - Threats, vulnerabilities and risk assessment |
| Industrial Automation and Control Systems (IACS) Overview | 15% | - Cybersecurity importance in industrial environments - IACS components, architectures and protocols - Differences between IT and OT security |
| Access Control & Identity Management | 15% | - User authentication and authorization - Security policies and procedures - Role-based access control |
| Security Operations & Incident Response | 20% | - Cybersecurity Management System (CSMS) - Incident handling and response processes - Monitoring, maintenance and continuous improvement |
| Security Fundamentals & ISA/IEC 62443 Framework | 20% | - Foundational security requirements - Structure and parts of ISA/IEC 62443 standards - Core security principles: CIA triad, defense-in-depth - Zones and conduits model |
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NEW QUESTION # 20
What is one challenge associated with firewalls?
Answer: A
Explanation:
A significant challenge with firewalls in industrial environments is deciding how they should be configured.
The complexity arises from needing to balance operational requirements (such as process data flow) with security needs (such as blocking unauthorized access). Misconfiguration can lead either to security gaps or to unnecessary operational disruptions. Firewalls can filter many types of traffic (not just HTTP) and while updates are important, configuration is the biggest ongoing challenge.
Reference: ISA/IEC 62443-3-3:2013, Section 4.2.3.3 (Firewalls and configuration management); ISA/IEC
62443-2-1:2009, Section 6.3.2.
NEW QUESTION # 21
Why is patch management more difficult for IACS than for business systems?
Available Choices (select all choices that are correct)
Answer: A
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 # 22
Which of the following activities is NOT listed under the "Patch Testing" phase in the asset owner requirements?
Answer: C
Explanation:
According to ISA/IEC 62443-2-3, patch testing involves several tasks to ensure the patch is safe and effective before deployment. These include:
File authenticity verification
Notification of applicable systems/users
Qualification and verification testing
However, a "removal procedure" is not listed as a standard activity under patch testing - although rollback planning might be a best practice, it is not specifically listed in the test phase.
"Patch testing activities include verification of patch authenticity, notification to relevant stakeholders, and qualification testing in a representative environment."
- ISA/IEC 62443-2-3:2015, Clause 6.1.2 - Patch Testing and Validation
References:
ISA/IEC 62443-2-3:2015 - Clause 6.1.2
ISA/IEC 62443-2-1 - Operational patch planning
NEW QUESTION # 23
What is the formula for calculating risk?
Answer: C
Explanation:
The formula for risk in ISA/IEC 62443 is typically expressed as:
Risk = Threat × Vulnerability × 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 × Vulnerability × Consequence"); ISA/IEC 62443-2-1:2009, Section 5.2.4.
NEW QUESTION # 24
Whose responsibility is it to determine the level of risk an organization is willing to tolerate?
Available Choices (select all choices that are correct)
Answer: B
Explanation:
According to the ISA/IEC 62443 standards, the level of risk an organization is willing to tolerate is determined by the management, as they are responsible for defining the business and risk objectives, as well as the security policies and procedures for the organization. The management also has the authority to allocate the necessary resources and assign the roles and responsibilities for implementing and maintaining the security program. The legal, operations, and safety departments may provide input and feedback to the management, but they do not have the final say in determining the risk tolerance level. References: ISA/IEC 62443-2-1:2010
- Establishing an industrial automation and control systems security program, section 4.2.1.
NEW QUESTION # 25
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