ISA ISA-IEC-62443 Exam Questions (Updated 2026) 100% Real Question Answers
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NEW QUESTION # 33
In an IACS system, a typical security conduit consists of which of the following assets?
- A. Ferrous, thickwall, and threaded conduit including raceways
- B. Wiring, routers, switches, and network management devices
- C. Power lines, cabinet enclosures, and protective grounds
- D. Controllers, sensors, transmitters, and final control elements
Answer: B
Explanation:
In ISA/IEC 62443, a conduit is a logical or physical communication path used to connect security zones and is typically composed of:
Routers and switches
Network cabling (wiring)
Firewalls and network management devices
"A conduit is used to implement the flow of data between zones, and includes the communication hardware and associated logical controls such as firewalls, switches, and routers."
- ISA/IEC 62443-1-1:2007, Clause 3.3.44 - Conduit
This differs from physical electrical conduits, which are not a cybersecurity concept.
References:
ISA/IEC 62443-1-1:2007 - Clause 3.3.44
ISA/IEC 62443-3-2 - Zone and Conduit Model (Clause 5.3)
NEW QUESTION # 34
In an IACS system, a typical security conduit consists of which of the following assets?
Available Choices (select all choices that are correct)
- A. Ferrous, thickwall, and threaded conduit including raceways
- B. Wiring, routers, switches, and network management devices
- C. Power lines, cabinet enclosures, and protective grounds
- D. Controllers, sensors, transmitters, and final control elements
Answer: B
Explanation:
A security conduit is a logical or physical grouping of communication channels connecting two or more zones that share common security requirements1. A zone is a grouping of systems and components based on their functional, logical, and physical relationship that share common security requirements1. Therefore, a security conduit consists of assets that enable or facilitatecommunication between zones, such as wiring, routers, switches, and network management devices. Controllers, sensors, transmitters, and final control elements are examples of assets that belong to a zone, not a conduit. Ferrous, thickwall, and threaded conduit including raceways are physical structures that may enclose or protect wiring, but they are not part of the communication channels themselves. Power lines, cabinet enclosures, and protective grounds are also not part of the communication channels, but rather provide power or protection to the assets in a zone or a conduit. References: 1: Key Concepts of ISA/IEC 62443: Zones & Security Levels | Dragos
NEW QUESTION # 35
What is the name of the protocol that implements serial Modbus over Ethernet?
Available Choices (select all choices that are correct)
- A. MODBUS/Ethernet
- B. MODBUS/CIP
- C. MODBUS/TCP
- D. MODBUS/Plus
Answer: C
NEW QUESTION # 36
If an asset owner wants to demonstrate compliance with ISA/IEC 62443-2-1 requirements during an external audit, which type of evidence would be MOST appropriate?
- A. Documentation verifying use and configuration of technologies
- B. Marketing materials describing the company's commitment to security
- C. Anecdotal reports from employees about security practices
- D. Financial investment records in cybersecurity tools only
Answer: A
Explanation:
ISA/IEC 62443-2-1 requires objective, verifiable evidence of cybersecurity controls during audits and assessments.
Step 1: Evidence-based verification
Auditors assess whether required processes and technical controls are implemented and effective.
Documentation such as configurations, procedures, logs, and policies provides verifiable proof.
Step 2: Why documentation matters
Written records demonstrate consistency, repeatability, and governance-key goals of the standard.
Step 3: Why other options fail
Financial spending does not prove control effectiveness. Anecdotes are subjective. Marketing materials are not evidence.
Thus, documentation verifying use and configuration of technologies is the correct evidence.
NEW QUESTION # 37
How many element groups are in the "Addressing Risk" CSMS category?
Available Choices (select all choices that are correct)
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
The "Addressing Risk" CSMS category consists of three element groups: Security Policy, Organization and Awareness; Selected Security Countermeasures; and Implementation of Security Program1. These element groups cover the aspects of defining the security objectives, roles and responsibilities, policies and procedures, awareness and training, security countermeasures selection and implementation, and security program execution and maintenance1. The "Addressing Risk" CSMS category aims to reduce the security risk to an acceptable level by applying appropriate security measures to the system under consideration (SuC)
1. References: 1: ISA/IEC 62443-2-1: Security for industrial automation and control systems: Establishing an industrial automation and control systems security program
NEW QUESTION # 38
Which is the BEST deployment system for malicious code protection?
Available Choices (select all choices that are correct)
- A. IACS protocol converters
- B. Application whitelistinq (AWL) OD.
- C. Network segmentation
- D. Zones and conduits
Answer: B
Explanation:
Application whitelisting (AWL) is a technique that allows only authorized applications to run on a system, and blocks any unauthorized or malicious code from executing. AWL is one of the most effective methods for preventing malware infections and reducing the attack surface of a system. AWL can be implemented at different levels, such as the operating system, the network, or the application itself. AWL is especially useful for industrial automation and control systems (IACS), which often run on legacy or proprietary platforms that are not compatible with traditional antivirus software or other security solutions. AWL can also help protect IACS from zero-day attacks, which exploit unknown vulnerabilities that have not been patched or detected by security vendors. AWL is recommended by the ISA/IEC 62443 standards as a key component of malicious code protection for IACS. According to the standards, AWL should be applied to all IACS components that support it, and should be configured and maintained according to the security policies and procedures of the organization. AWL should also be complemented by other security measures, such as network segmentation, zones and conduits, and patch management, to provide a defense-in-depth approach to IACS security. References:
ISA/IEC 62443-3-3:2013, System security requirements and security levels, Section 5.2.3.41 ISA/IEC 62443-2-1:2010, Establishing an industrial automation and control systems security program, Section 4.3.3.6.42 ISA/IEC 62443-4-2:2019, Technical security requirements for IACS components, Section 4.2.3.43 ISA/IEC 62443-3-2:2020, Security risk assessment for system design, Section 7.3.3.44 ISA/IEC 62443-4-1:2018, Product development requirements, Section 5.2.3.45
NEW QUESTION # 39
Which layer in the Open Systems Interconnection (OSI) model would include the use of the File Transfer Protocol (FTP)?
Available Choices (select all choices that are correct)
- A. Data link layer
- B. Session layer
- C. Transport layer
- D. Application layer
Answer: D
Explanation:
The File Transfer Protocol (FTP) is an application layer protocol that moves files between local and remote file systems. It runs on top of TCP, like HTTP. To transfer a file, 2 TCP connections are used by FTP in parallel: control connection and data connection. The control connection is used to send commands and responses between the client and the server, while the data connection is used to transfer the actual file. FTP is one of the standard communication protocols defined by the TCP/IP model and it does not fit neatly into the OSI model. However, since the OSI model is a reference model that describes the general functions of each layer, FTP can be considered as an application layer protocol in the OSI model, as it provides user services and interfaces to the network. The application layer is the highest layer in the OSI model and it is responsible for providing various network services to the users, such as email, web browsing, file transfer, remote login, etc. The application layer interacts with the presentation layer, which is responsible for data formatting, encryption, compression, etc. The presentation layer interacts with the session layer, which is responsible for establishing, maintaining, and terminating sessions between applications. The session layer interacts with the transport layer, which is responsible for reliable end-to-end data transfer and flow control. The transport layer interacts with the network layer, which is responsible for routing and addressing packets across different networks. The network layer interacts with the data link layer, which is responsible for framing, error detection, and medium access control. The data link layer interacts with the physical layer, which is responsible for transmitting and receiving bits over the physical medium. References:
* File Transfer Protocol (FTP) in Application Layer1
* FTP Protocol2
* What OSI layer is FTP?3
NEW QUESTION # 40
Which activity is part of establishing policy, organization, and awareness?
Available Choices (select all choices that are correct)
- A. Implement countermeasures.
- B. Establish the risk tolerance.
- C. Identify detailed vulnerabilities.
- D. Communicate policies.
Answer: D
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 # 41
Which is one of the PRIMARY goals of providing a framework addressing secure product development
life-cycle requirements?
Available Choices (select all choices that are correct)
- A. Aligned needs of industrial users
- B. Aligned development process
- C. Well-documented security policies and procedures
- D. Defense-in-depth approach to designing
Answer: D
NEW QUESTION # 42
During the operation of an IACS, who is responsible for executing the Security Protection Scheme (SPS) process measures and responding to emerging risks?
- A. The asset owner
- B. The product vendor
- C. The external auditor
- D. The system integrator
Answer: A
Explanation:
The asset owner holds ultimate responsibility for implementing and maintaining security measures, including the Security Protection Scheme (SPS) during the operational phase of the lifecycle. According to ISA/IEC
62443-2-1 and ISA/IEC 62443-1-1, the asset owner is tasked with ensuring that the necessary security policies, procedures, and controls are effectively executed and maintained.
"The asset owner shall define and maintain the operational security policies and procedures, ensuring the execution of the protection scheme and risk mitigation actions."
- ISA/IEC 62443-2-1:2010, Section 4.3
Furthermore, ISA/IEC 62443-1-1 clearly defines the roles and responsibilities of the asset owner in terms of operational security enforcement and ongoing risk response.
References:
ISA/IEC 62443-2-1:2010 - Section 4.3
ISA/IEC 62443-1-1:2007 - Role of Asset Owner
ISA/IEC 62443-3-2 - Risk assessment and management responsibilities
NEW QUESTION # 43
Which of the following is a cause for the increase in attacks on IACS?
Available Choices (select all choices that are correct)
- A. Use of proprietary communications protocols
- B. The move away from commercial off the shelf (COTS) systems, protocols, and networks
- C. Fewer personnel with system knowledge having access to IACS
- D. Knowledge of exploits and tools readily available on the Internet
Answer: A,D
Explanation:
One of the reasons for the increase in attacks on IACS is the availability of information and tools that can be used to exploit vulnerabilities in these systems. The Internet provides a platform for hackers, researchers, and activists to share their knowledge and techniques for compromising IACS. Some examples of such information and tools are:
* Stuxnet: A sophisticated malware that targeted the Iranian nuclear program in 2010. It exploited four zero-day vulnerabilities in Windows and Siemens software to infect and manipulate the programmable logic controllers (PLCs) that controlled the centrifuges. Stuxnet was widely analyzed and reported by the media and security experts, and its source code was leaked online1.
* Metasploit: A popular penetration testing framework that contains modules for exploiting various IACS components and protocols. For instance, Metasploit includes modules for attacking Modbus, DNP3, OPC, and Siemens S7 devices2.
* Shodan: A search engine that allows users to find devices connected to the Internet, such as webcams, routers, printers, and IACS components. Shodan can reveal the location, model, firmware, and configuration of these devices, which can be used by attackers to identify potential targets and vulnerabilities3.
* ICS-CERT: A website that provides alerts, advisories, and reports on IACS security issues and incidents. ICS-CERT also publishes vulnerability notes and mitigation recommendations for various IACS products and vendors4. These sources of information and tools can be useful for legitimate purposes, such as security testing, research, and education, but they can also be misused by malicious actors who want to disrupt, damage, or steal from IACS. Therefore, IACS owners and operators should be aware of the threats and risks posed by the Internet and implement appropriate security measures to protect their systems. References:
* The increase in attacks on Industrial Automation and Control Systems (IACS) can be attributed to several factors, including: A. Use of proprietary communications protocols: These can pose security risks because they may not have been designed with security in mind and are often not as well-tested against security threats as more standard protocols. C. Knowledge of exploits and tools readily available on the Internet: The availability of information about vulnerabilities and exploits on the internet has made it easier for attackers to target IACS.
* The other options, B and D, are incorrect because: B. The move towards commercial off-the-shelf (COTS) systems, protocols, and networks actually increases risk because these systems are more likely to be known and targeted by attackers, compared to proprietary systems which might benefit from security through obscurity. D. There is actually an increase in risk with more personnel with system knowledge because it enlarges the attack surface - each individual with system knowledge can potentially become a vector for an attack, either maliciously or accidentally.
NEW QUESTION # 44
Which NIST Special Publication focuses specifically on securing Industrial Control Systems (ICS)?
- A. SP 800-30
- B. SP 800-171
- C. SP 800-53
- D. SP 800-82
Answer: D
Explanation:
ISA/IEC 62443 recognizes that organizations may align their IACS cybersecurity programs with other authoritative guidance. Within the NIST Special Publications, SP 800-82 is the document specifically dedicated to Industrial Control Systems security.
Step 1: Scope of SP 800-82
SP 800-82 provides guidance tailored to ICS environments, including SCADA, DCS, and PLC-based systems. It addresses availability, safety, and real-time constraints similar to ISA/IEC 62443.
Step 2: Complementary relationship
ISA/IEC 62443 and SP 800-82 are often used together: ISA/IEC 62443 provides auditable requirements, while SP 800-82 provides practical implementation guidance.
Step 3: Why other options are incorrect
* SP 800-30 focuses on risk assessment
* SP 800-53 defines general security controls
* SP 800-171 focuses on protecting CUI in non-federal systems
Therefore, the correct answer is SP 800-82.
NEW QUESTION # 45
How should patching be approached within an organization?
- A. As part of the broader risk management strategy
- B. As a purely technical task with no business implications
- C. By ignoring downtime and costs
- D. Only after a cyberattack has occurred
Answer: A
Explanation:
ISA/IEC 62443 treats patch management as a risk-based organizational process, not a reactive or purely technical activity. Within 62443-2-1 and related asset owner requirements, patching is explicitly linked to risk assessment, operational impact, safety, and availability.
Step 1: Risk-based decision making
Patches introduce both benefits (vulnerability mitigation) and risks (downtime, instability, safety impact). ISA
/IEC 62443 requires asset owners to evaluate patches based on their contribution to reducing cybersecurity risk while considering operational constraints.
Step 2: Integration into management processes
Patch management is part of configuration management, change management, and incident prevention. This ensures patches are tested, scheduled, approved, and deployed in a controlled manner consistent with business priorities.
Step 3: Avoiding incorrect approaches
* Ignoring downtime and cost violates availability and safety objectives.
* Waiting until after an attack contradicts preventive risk management.
* Treating patching as purely technical ignores business, safety, and production impacts.
Step 4: Lifecycle alignment
ISA/IEC 62443 emphasizes that patching must be planned and executed throughout the Operate and Maintain phase as part of continuous risk reduction.
Therefore, the standard clearly requires patching to be handled as part of the broader risk management strategy, making Option C correct.
NEW QUESTION # 46
What is a feature of an asymmetric key?
Available Choices (select all choices that are correct)
- A. Shares the same key OD.
- B. Uses different keys
- C. Has lower network overhead
- D. Uses a continuous stream
Answer: B
Explanation:
An asymmetric key is a feature of asymmetric cryptography, also known as public-key cryptography, which is a method of encrypting and decrypting data using two different keys: a public key and a private key. The public key can be shared with anyone, while the private key must be kept secret by the owner. The public key and the private key aremathematically related, but it is computationally infeasible to derive one from the other.
Asymmetric cryptography can be used for various purposes, such as digital signatures, key exchange, and encryption. For example, if Alice wants to send a message to Bob, she can use Bob's public key to encrypt the message, and only Bob can decrypt it using his private key. Alternatively, if Bob wants to prove that he is the author of a message, he can use his private key to sign the message, and anyone can verify it using his public key. Asymmetric cryptography has some advantages over symmetric cryptography, which uses the same key for both encryption and decryption. For instance, asymmetric cryptography does not require a secure channel to distribute the keys, and it can provide non-repudiation and authentication. However, asymmetric cryptography also has some drawbacks, such as higher computational complexity, larger key sizes, and higher network overhead.
References:
* ISA/IEC 62443-3-3:2018, Section 4.2.3.6.1, Cryptography1
* ISA/IEC 62443-4-2:2019, Section 4.2.3.6.1, Cryptography
* ISA/IEC 62443 Cybersecurity Fundamentals Specialist Study Guide, Section 5.3.1, Cryptography
* ISA/IEC 62443 Cybersecurity Fundamentals Specialist Exam Specification, Section 5.3.1,
* Cryptography
NEW QUESTION # 47
Which steps are part of implementing countermeasures?
Available Choices (select all choices that are correct)
- A. Select common countermeasures and collaborate with stakeholders.
- B. Select common countermeasures and update the business continuity plan.
- C. Establish the risk tolerance and update the business continuity plan.
- D. Establish the risk tolerance and select common countermeasures.
Answer: D
NEW QUESTION # 48
Which is a reason for
and physical security regulations meeting a mixed resistance?
Available Choices (select all choices that are correct)
- A. Cybersecurity risks can best be managed individually and in isolation.
- B. Regulations contain only informative elements.
- C. Regulations are voluntary documents.
- D. There are a limited number of enforced cybersecurity and physical security regulations.
Answer: D
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 comprehensive regulations 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 # 49
Which layer specifies the rules for Modbus Application Protocol
Available Choices (select all choices that are correct)
- A. Presentation layer
- B. Data link layer
- C. Session layer
- D. Application layer
Answer: D
Explanation:
The Modbus Application Protocol is a messaging protocol that provides client/server communication between devices connected on different types of buses or networks. It is positioned at level 7 of the OSI model, which is the application layer. The application layer is the highest level of the OSI model and defines the rules and formats for data exchange between applications. The Modbus Application Protocol is independent of the underlying communication layers and can be implemented using different transport protocols, such as TCP
/IP, serial, or Modbus Plus. The Modbus Application Protocol defines the function codes, data formats, and error codes for Modbus transactions123 References:
* MODBUS APPLICATION PROTOCOL SPECIFICATION V1
* Modbus - Wikipedia
* Overview of Modbus - EPICS support for Modbus - GitHub Pages
NEW QUESTION # 50
What change was introduced in the second edition (2024) of ISA-62443-2-1 compared to the first edition (2010)?
- A. Elimination of duplication of ISMS requirements
- B. Focus only on individual system components rather than overall system
- C. Introduction of a new PDCA cycle framework
- D. Removal of supply chain security considerations
Answer: A
Explanation:
The second edition (2024) of ISA/IEC 62443-2-1 introduced a significant structural improvement by eliminating duplication of Information Security Management System (ISMS) requirements. The first edition (2010) contained content that overlapped substantially with ISO/IEC 27001-style ISMS controls, leading to redundancy and unnecessary implementation burden.
In the updated edition, ISA clarified that 62443-2-1 is not intended to replace a general-purpose ISMS, but rather to extend and specialize it for Industrial Automation and Control Systems (IACS). As a result, duplicated ISMS clauses were removed or streamlined, and the focus shifted to IACS-specific risks, operational realities, and lifecycle concerns.
This change improves:
* Compatibility with existing enterprise ISMS implementations
* Clarity of roles between IT security governance and OT security management
* Practical adoption by asset owners operating both IT and OT environments Importantly, supply chain security, lifecycle management, and organizational governance were not removed.
Instead, they were better aligned and referenced to avoid redundancy. The PDCA model remains implicit but was not newly introduced in 2024.
Thus, the defining change is the elimination of duplicated ISMS requirements, making Option B correct.
NEW QUESTION # 51
What type of security level defines what a component or system is capable of meeting?
Available Choices (select all choices that are correct)
- A. Capability security level
- B. Design security level
- C. Target security level
- D. Achieved security level
Answer: A
Explanation:
According to the IEC 62443 standard, a capability security level (SL-C) is defined as "the security level that a component or system is capable of meeting when it is properly configured and protected by an appropriate set of security countermeasures" 1. A component or system can have different SL-Cs for different security requirements, depending on its design and implementation. The SL-C is determined by testing the component or system against a set of security test cases that correspond to the security requirements. The SL-C is not dependent on the actual operational environment orconfiguration of the component or system, but rather on its inherent capabilities. References:
* IEC 62443 - Wikipedia
NEW QUESTION # 52
What is the purpose of ISO/IEC 15408 (Common Criteria)?
Available Choices (select all choices that are correct)
- A. To describe a process for risk management
- B. To define a product development evaluation methodology
- C. To define a security management organization
- D. To describe what constitutes a secure product
Answer: B
Explanation:
ISO/IEC 15408, also known as the Common Criteria for Information Technology Security Evaluation, is an international standard that provides a framework for evaluating the security of IT products and systems. The purpose of the standard is to define a common set of requirements for the security functions and assurance measures of IT products and systems, and to establish a common methodology for conducting security evaluations. The standard allows users to specify their security needs and expectations in a Security Target (ST), which may be based on one or more Protection Profiles (PPs)that define security requirements for a class of products or systems. Vendors can then implement or claim compliance with the ST or PPs, and have their products or systems evaluated by independent testing laboratories against the security criteria defined in the standard. The standard also defines a scale of Evaluation Assurance Levels (EALs) that indicate the degree of confidence in the security of the evaluated product or system. The standard is intended to facilitate the development, procurement, and use of secure IT products and systems, and to promote the recognition and acceptance of evaluation results across different countries and regions. References:
* ISO/IEC 15408-1:2009 - Common Criteria Evaluation for IT Security - Nemko1
* Common Criteria - Wikipedia2
* ISO/IEC Standard 15408 - ENISA3
NEW QUESTION # 53
What is the definition of "defense in depth" when referring to cybersecurity?
- A. Applying multiple countermeasures in a layered or stepwise manner
- B. Aligning all resources to provide a broad technical gauntlet
- C. Requiring a minimum distance requirement between security assets
- D. Using countermeasures that have intrinsic technical depth
Answer: A
Explanation:
"Defense in Depth" is a foundational principle in ISA/IEC 62443, defined as:
"The application of multiple security countermeasures in a layered (stepwise) fashion to protect assets." (ISA/IEC 62443-1-1, Clause 3.2.65) The objective is to reduce the probability that a single point of failure or vulnerability can be exploited to compromise the system. Layers may include physical security, network segmentation, authentication, intrusion detection, and endpoint protection.
From ISA/IEC 62443-3-3:
"Defense in depth should be employed to provide redundancy in security mechanisms. Each layer increases the security of the system and mitigates different types of threats." Incorrect Options:
A and B - Misinterpret the concept as technical complexity, rather than layered protection.
C - Refers to physical spacing, not a cybersecurity strategy.
References:
ISA/IEC 62443-1-1:2007 - "Terminology, Concepts, and Models"
ISA/IEC 62443-3-3:2013 - "System Security Requirements and Security Levels" ISA/IEC 62443 Study Guide
NEW QUESTION # 54
An industrial facility wants to ensure that only authorized systems reach its PLCs while minimizing disruption to time-sensitive control processes. Which type of firewall would BEST suit this need?
- A. General-purpose software firewall
- B. IACS-specific firewall with deep packet inspection
- C. Unidirectional gateway (data diode)
- D. Basic packet filter firewall without protocol awareness
Answer: B
Explanation:
For industrial networks, the most effective approach is to use IACS-specific firewalls that perform deep packet inspection (DPI) of industrial protocols (e.g., Modbus, DNP3, OPC UA).
"Industrial-specific firewalls with DPI capabilities can inspect control system protocols and enforce granular access control without disrupting time-sensitive operations."
- ISA/IEC 62443-3-3:2013, SR 5.1 - Zone Boundary Protection
Unlike generic IT firewalls, IACS-specific firewalls:
Understand OT protocols
Enforce real-time constraints
Support deterministic traffic flows
References:
ISA/IEC 62443-3-3:2013 - SR 5.1
ISA/IEC 62443-1-1 - Zone and conduit protection technologies
NEW QUESTION # 55
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 medium priority, schedule the installation within three months after receipt.
- D. If a low priority, there is no need to apply the patch.
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 # 56
What is the primary audience for Part 2-5 of the ISA/IEC 62443 Series - Policies & Procedures group of standards?
- A. Asset owners
- B. Product suppliers
- C. System integrators
- D. Service providers
Answer: D
Explanation:
ISA/IEC 62443-2-5 provides requirements and guidance specifically for service providers (such as those delivering IACS-related managed services, maintenance, or cybersecurity services). While system integrators and asset owners use this guidance, its main audience is service providers, ensuring that their procedures align with cybersecurity best practices for IACS.
Reference: ISA/IEC 62443-2-5:2019, Scope and Introduction.
NEW QUESTION # 57
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