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ISA-IEC-62443 Real Exam Question Answers Updated [Feb 07, 2025]
NEW QUESTION # 13
Safety management staff are stakeholders of what security program development?
Available Choices (select all choices that are correct)
- A. SPRP
- B. ERM
- C. CSMS
- D. CSA
Answer: C
NEW QUESTION # 14
Which steps are part of implementing countermeasures?
Available Choices (select all choices that are correct)
- A. Establish the risk tolerance and update the business continuity plan.
- B. Select common countermeasures and update the business continuity plan.
- C. Establish the risk tolerance and select common countermeasures.
- D. Select common countermeasures and collaborate with stakeholders.
Answer: C
Explanation:
According to the ISA/IEC 62443-3-2 standard, implementing countermeasures is one of the steps in the security risk assessment for system design. The standard defines a comprehensive set of engineering measures to guide organizations through the process of assessing the risk of a particular industrial automation and control system (IACS) and identifying and applying security countermeasures to reduce that risk to tolerable levels. The standard recommends the following steps for implementing countermeasures:
* Establish the risk tolerance: This step involves determining the acceptable level of risk for the organization and the system under consideration, based on the business objectives, legal and regulatory requirements, and stakeholder expectations. The risk tolerance can be expressed as a target security level (SL-T) for each zone or conduit in the system.
* Select common countermeasures: This step involves selecting the appropriate security countermeasures for each zone or conduit, based on the SL-T and the existing security level (SL-A) of the system. The standard provides a list of common countermeasures for each security level, covering the domains of physical security, network security, system security, and application security. The selected countermeasures should be documented and justified in the security risk assessment report. References:
ISA/IEC 62443 Cybersecurity Series Designated as IEC Horizontal Standards, Cybersecurity Risk Assessment According to ISA/IEC 62443-3-2
NEW QUESTION # 15
Which communications system covers a large geographic area?
Available Choices (select all choices that are correct)
- A. Storage Area Network
- B. Wide Area Network (WAN)
- C. Campus Area Network (CAN)
- D. Local Area Network (LAN)
Answer: B
Explanation:
A Wide Area Network (WAN) is a communications system that covers a large geographic area, such as a city, a country, or even several countries or continents1. WANs are often used to connect local area networks (LANs) and other types of networks together, so that users and computers in one location can communicate with users and computers in other locations2. WANs use various communication infrastructures, such as public telephone lines, undersea cables, and communication satellites, to transmit data over long distances1. WANs are typically established with leased telecommunication circuits or less costly circuit switching or packet switching methods2. WANs are often built by Internet service providers, who provide connections from an organization's LAN to the Internet2. The Internet itself may be considered a WAN2. References: Hardware and network technologies - CCEA LAN and WAN - BBC, Wide area network
- Wikipedia.
NEW QUESTION # 16
Which is an important difference between IT systems and IACS?
Available Choices (select all choices that are correct)
- A. The IACS security priority is integrity.
- B. Routers are not used in IACS networks.
- C. IACS cybersecurity must address safety issues.
- D. The IT security priority is availability.
Answer: A,C
Explanation:
IT systems and IACS have different security priorities, requirements, and challenges. According to the ISA/IEC 62443 standards, the security priority for IT systems is confidentiality, which means protecting the data from unauthorized access or disclosure. The security priority for IACS is integrity, which means ensuring the accuracy and consistency of the data and the functionality of the system. A loss of integrity in an IACS can have severe consequences, such as physical damage, environmental harm, or human injury. Therefore, IACS cybersecurity must address safety issues, which are not typically considered in IT security. Safety is the ability of the system to prevent or mitigate hazardous events that can cause harm to people, property, or the environment. The ISA/IEC 62443 standards provide guidance and best practices for ensuring the safety and security of IACS, as well as the availability and reliability of the system. Availability is the ability of the system to perform its intended function when required, and reliability is the ability of the system to perform its intended function without failure. These properties are also important for IT systems, but they may have different trade-offs and implications for IACS. For example, an IACS may have stricter performance and availability requirements than an IT system, as a delay or disruption in the IACS operation can affect the industrial process and its outcomes. Additionally, an IACS may have longer equipment lifetimes and less frequent maintenance windows than an IT system, which can make patching and updating more difficult and risky. Furthermore, an IACS may use different technologies and architectures than an IT system, such as legacy devices, proprietary protocols, or specialized hardware. These factors can create compatibility and interoperability issues, as well as increase the attack surface and complexity of the IACS. Therefore, IT security solutions and practices may not be sufficient or suitable for IACS, and they may need to be adapted or supplemented by IACS-specific security measures. The ISA/IEC 62443 standards address these differences and provide a comprehensive framework for securing IACS throughout their lifecycle.
References: 1: Security of Industrial Automation and Control Systems - ISAGCA 2: ISA/IEC 62443 Series of Standards - ISA 3: ISA/IEC 62443 Series of Standards | ISAGCA 4: Securing IACS based on ISA/IEC 62443
- Part 1: The Big Picture
* The key differences between IT (Information Technology) systems and IACS (Industrial Automation and Control Systems) are centered on their primary security objectives and operational requirements:
* Option A: The IACS security priority is integrity. This is crucial because any unauthorized modification of data or commands can lead to severe operational disruptions and safety hazards.
* Option C: IACS cybersecurity must address safety issues. Safety is a primary concern in IACS environments where process disruptions or malfunctions can result in harm to human operators or damage to equipment. The primary security priority in traditional IT systems is often confidentiality, not availability as stated in Option B, and routers are commonly used in IACS networks, contrary to Option
D.
NEW QUESTION # 17
Whose responsibility is it to determine the level of risk an organization is willing to tolerate?
Available Choices (select all choices that are correct)
- A. Safety Department
- B. Operations Department
- C. Legal Department
- D. Management
Answer: D
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 # 18
Which is a common pitfall when initiating a CSMS program?
Available Choices (select all choices that are correct)
- A. Immediate jump into detailed risk assessment
- B. Failure to relate to the mission of the organization
- C. Organizational lack of communication
- D. Insufficient documentation due to lack of good follow-up
Answer: B
NEW QUESTION # 19
Which policies and procedures publication is titled Patch Manaqement in the IACS Environment?
Available Choices (select all choices that are correct)
- A. ISA-TR62443-2-3
- B. ISA-62443-3-3
- C. ISA-TR62443-1-4
- D. ISA-62443-4-2
Answer: A
Explanation:
ISA-TR62443-2-3 is the technical report that describes the requirements for asset owners and industrial automation and control system (IACS) product suppliers that have established and are now maintaining an IACS patch management program. Patch management is the process of applying software updates to fix vulnerabilities, bugs, or performance issues in the IACS components. Patch management is an essential part of maintaining the security and reliability of the IACS environment. The technical report provides guidance on how to establish a patch management policy, how to assess the impact and risk of patches, how to test and deploy patches, and how to monitor and audit the patch management process. References: 1, 2, 3
NEW QUESTION # 20
Which of the following is an activity that should trigger a review of the CSMS?
Available Choices (select all choices that are correct)
- A. New technical controls
- B. Security incident exposing previously unknown risk.
- C. Budgeting
- D. Organizational restructuring
Answer: A,B,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 # 21
Why is OPC Classic considered firewall unfriendly?
Available Choices (select all choices that are correct)
- A. OPC Classic is an obsolete communication standard.
- B. OPC Classic uses DCOM, which dynamically assigns any port between 1024 and 65535.
- C. OPC Classic is allowed to use only port 80.
- D. OPC Classic works with control devices from different manufacturers.
Answer: B
NEW QUESTION # 22
What is the purpose of ISO/IEC 15408 (Common Criteria)?
Available Choices (select all choices that are correct)
- A. To describe what constitutes a secure product
- B. To define a security management organization
- C. To describe a process for risk management
- D. To define a product development evaluation methodology
Answer: D
NEW QUESTION # 23
What is the name of the missing layer in the Open Systems Interconnection (OSI) model shown below?
- A. Protocol
- B. Control
- C. Transport
- D. User
Answer: C
Explanation:
The Open Systems Interconnection (OSI) model is a framework that describes the functions of a networking system. The OSI model categorizes the computing functions of the different network components, outlining the rules and requirement needed to support the interoperability of the software and hardware that make up the network1.
The OSI model consists of seven abstraction layers arranged in a top-down order: Physical, Data Link, Network, Transport, Session, Presentation, and Application. The Transport layer is the fourth layer in the OSI model, and it is responsible for ensuring reliable and efficient data transfer between the Network layer and the Session layer2. The Transport layer uses protocols such as Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) to provide end-to-end communication services, such as error detection and correction, flow control, congestion control, and segmentation2.
The image that you sent shows a 3D representation of the OSI model, with the layers stacked on top of each other. The missing layer is the Transport layer, which isrepresented by a pink box with a white arrow pointing to it. The arrow is labeled "TCP, UDP".
1: What is the OSI Model? 7 Network Layers Explained | Fortinet 2: What is OSI Model | 7 Layers Explained
- GeeksforGeeks
NEW QUESTION # 24
Which activity is part of establishing policy, organization, and awareness?
Available Choices (select all choices that are correct)
- A. Implement countermeasures.
- B. Communicate policies.
- C. Identify detailed vulnerabilities.
- D. Establish the risk tolerance.
Answer: B
Explanation:
According to the ISA/IEC 62443 Cybersecurity Fundamentals Specialist course, establishing policy, organization, and awareness is one of the four steps of the IACS cybersecurity lifecycle. This step involves defining the cybersecurity policies, roles, and responsibilities, as well as communicating them to the relevant stakeholders. It also involves establishing the risk tolerance level, which is the acceptable level of risk for the organization. Communicating policies and establishing the risk tolerance are both activities that are part of this step. Identifying detailed vulnerabilities and implementing countermeasures are activities that belong to the next steps of the lifecycle, which are assessing the current situation and implementing the cybersecurity program, respectively. References: ISA/IEC 62443 Cybersecurity Fundamentals Specialist course, Module 2:
IACS Cybersecurity Lifecycle1
NEW QUESTION # 25
After receiving an approved patch from the JACS vendor, what is BEST practice for the asset owner to follow?
- A. If a high priority, apply the patch at the first unscheduled outage.
- B. If a medium priority, schedule the installation within three months after receipt.
- C. If a low priority, there is no need to apply the patch.
- D. If no problems are experienced with the current IACS, it is not necessary to apply the patch.
Answer: A
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 # 26
Which of the following is an industry sector-specific standard?
Available Choices (select all choices that are correct)
- A. API 1164
- B. NIST SP800-82
- C. ISO 27001
- D. ISA-62443 (EC 62443)
Answer: A
NEW QUESTION # 27
Which steps are included in the ISA/IEC 62443 assess phase?
Available Choices (select all choices that are correct)
- A. Allocation of IACS assets to zones and conduits, and detailed cyber risk assessment
- B. Cybersecurity requirements specification and detailed cyber risk assessment
- C. Cybersecurity requirements specification and allocation of IACS assets to zones and conduits
- D. Detailed cyber risk assessment and cybersecurity maintenance, monitoring, and management of change
Answer: C
Explanation:
The ISA/IEC 62443 standards are focused on industrial automation and control systems security. The assess phase within the ISA/IEC 62443 framework is designed to identify and analyze potential vulnerabilities in the industrial control system (ICS) environment. One of the key steps in this phase is the specification of cybersecurity requirements. Additionally, it involves the allocation of industrial automation and control system (IACS) assets to defined zones and conduits to manage and segregate the network and improve security. These measures help to ensure that security requirements are met and that the assets are protected according to their security needs. Therefore, the correct answer is B, which mentions both the cybersecurity requirements specification and the allocation of IACS assets to zones and conduits as part of the assess phase.
NEW QUESTION # 28
Which of the following is an industry sector-specific standard?
Available Choices (select all choices that are correct)
- A. API 1164
- B. NIST SP800-82
- C. ISA-62443 (EC 62443)
- D. D. ISO 27001
Answer: A
Explanation:
API 1164 is an industry sector-specific standard that provides guidance on the cybersecurity of pipeline supervisory control and data acquisition (SCADA) systems. API stands for American Petroleum Institute, which is the largest U.S. trade association for the oil and natural gas industry. API 1164 was first published in
2004 and revised in 2009 and 2021. The latest version of the standard aligns with the ISA/IEC 62443 series of standards and incorporates the concepts of security levels, zones, and conduits. API 1164 covers the security lifecycle of pipeline SCADA systems, from risk assessment and policy development to implementation and maintenance. The standard also defines roles and responsibilities, security requirements, security controls, and security assessment methods for pipeline SCADA systems.
References:
* API 1164: Pipeline SCADA Security, Fourth Edition, September 2021
* ISA/IEC 62443 Cybersecurity Fundamentals Specialist Study Guide, Section 2.2.2, Industry Sector-Specific Standards
* ISA/IEC 62443 Cybersecurity Fundamentals Specialist Exam Specification, Section 2.2.2, Industry Sector-Specific Standards
NEW QUESTION # 29
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