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NEW QUESTION # 33
Which is the PRIMARY objective when defining a security zone?
Available Choices (select all choices that are correct)
- A. All assets in the zone must be from the same vendor.
- B. All assets in the zone must be at the same level in the Purdue model.
- C. All assets in the zone must share the same security requirements.
- D. All assets in the zone must be physically located in the same area.
Answer: C
Explanation:
According to the ISA/IEC 62443-3-2 standard, a security zone is a grouping of systems and components based on their functional, logical, and physical relationship that share common security requirements. The primary objective of defining a security zone is to apply a consistent level of protection to the assets within the zone, based on their criticality and risk assessment. A security zone may contain assets from different vendors, different levels in the Purdue model, or different physical locations, as long as they have the same security requirements. A security zone may also be subdivided into subzones, if there are different security requirements within the zone. A conduit is a logical or physical grouping of communication channels connecting two or more zones that share common security requirements.
References:
ISA/IEC 62443-3-2:2020, Security for industrial automation and control systems - Part 3-2: Security risk assessment for system design, Clause 4.3.21 ISA/IEC 62443-1-1:2009, Security for industrial automation and control systems - Part 1-1: Terminology, concepts and models, Clause 3.2.42
NEW QUESTION # 34
What are the three main components of the ISASecure Integrated Threat Analysis (ITA) Program?
Available Choices (select all choices that are correct)
- A. Software robustness security testing, functional software assessment assurance, and essential security functionality assessment
- B. Communication speed, disaster recovery, and essential security functionality assessment
- C. Communications robustness testing, functional security assurance, and software robustness communications
- D. Software development security assurance, functional security assessment, and communications robustness testing
Answer: D
Explanation:
The ISASecure Integrated Threat Analysis (ITA) Program is a certification scheme that certifies off-the-shelf automation and control systems to the ISA/IEC 62443 series of standards1. The ITA Program consists of three main components2:
* Software Development Security Assurance (SDSA): This component evaluates the security lifecycle and practices of the product supplier, such as security requirements, design, implementation, verification, and maintenance. The SDSA certification is based on the ISA/IEC 62443-4-1 standard.
* Functional Security Assessment (FSA): This component verifies the security functions and features implemented in the product, such as identification and authentication, access control, encryption, audit logging, and security management. The FSA certification is based on the ISA/IEC 62443-4-2 standard.
* Communications Robustness Testing (CRT): This component tests the resilience of the product against network attacks, such as denial-of-service, fuzzing, spoofing, and replay. The CRT certification is based on the ISA/IEC 62443-4-2 and ISA/IEC 62443-3-3 standards .
References:
* 1: ISASecure - IEC 62443 Conformance Certification - Official Site
* 2: ISASecure - IEC 62443 Conformance Certification - Official Site
* [3]: ISA/IEC 62443-4-1: Secure Product Development Lifecycle Requirements, ISA, 2018.
* [4]: ISA/IEC 62443-4-2: Technical Security Requirements for IACS Components, ISA, 2019.
* [5]: ISA/IEC 62443-4-2: Technical Security Requirements for IACS Components, ISA, 2019.
* [6]: ISA/IEC 62443-3-3: System Security Requirements and Security Levels, ISA, 2013.
NEW QUESTION # 35
What is a key feature of the NIS2 Directive?
- A. It establishes a cyber crisis management structure.
- B. It eliminates the need for public-private partnerships.
- C. It focuses solely on physical security regulations.
- D. It mandates compliance with all standards.
Answer: A
Explanation:
The NIS2 Directive, an update to the European Union's cybersecurity directive, introduces several new requirements, including the establishment of a cyber crisis management framework at both national and EU levels. This is designed to coordinate effective responses to major cybersecurity incidents and crises. NIS2 goes beyond mandating compliance or focusing only on physical security and emphasizes collaboration between the public and private sectors.
Reference: NIS2 Directive (Directive (EU) 2022/2555), Articles 9-11, and official ENISA documentation.
NEW QUESTION # 36
Which policies and procedures publication is titled Patch Manaqement in the IACS Environment?
Available Choices (select all choices that are correct)
- A. ISA-62443-3-3
- B. ISA-TR62443-2-3
- C. ISA-TR62443-1-4
- D. ISA-62443-4-2
Answer: B
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 # 37
Which type of cryptographic algorithms requires more than one key?
Available Choices (select all choices that are correct)
- A. Asymmetric (public) key
- B. Stream ciphers
- C. Block ciphers
- D. Symmetric (private) key
Answer: A
NEW QUESTION # 38
What is the name of the protocol that implements serial Modbus over Ethernet?
Available Choices (select all choices that are correct)
- A. MODBUS/TCP
- B. MODBUS/Plus
- C. MODBUS/Ethernet
- D. MODBUS/CIP
Answer: A
NEW QUESTION # 39
Which activity is part of establishing policy, organization, and awareness?
Available Choices (select all choices that are correct)
- A. Identify detailed vulnerabilities.
- B. Implement countermeasures.
- C. Establish the risk tolerance.
- D. Communicate policies.
Answer: D
NEW QUESTION # 40
Which of the following is an element of security policy, organization, and awareness?
Available Choices (select all choices that are correct)
- A. Staff training and security awareness
- B. Technical requirement assessment
- C. Penetration testing
- D. Product development requirements
Answer: B
NEW QUESTION # 41
Which factor drives the selection of countermeasures?
Available Choices (select all choices that are correct)
- A. Output from a risk assessment
- B. System design
- C. Security levels
- D. Foundational requirements
Answer: A
Explanation:
The selection of countermeasures is driven by the output from a risk assessment, which identifies the risks and their associated likelihood and consequences for each zone and conduit in the industrial automation and control system (IACS). The risk assessment also determines the target security level (SL-T) for each zone and conduit, which represents the desired level of protection against the identified threats. The countermeasures are then selected based on the SL-T and the existing security level (SL-A) of the zone and conduit, as well as the cost and feasibility of implementation. The countermeasures should aim to reduce the risk to an acceptable level by increasing the SL-A to meet or exceed the SL-T. References: ISA/IEC 62443-3-2:2018 - Security risk assessment for system design, ISA/IEC 62443-3-3:2013 - System security requirements and security levels, ISA/IEC 62443 Cybersecurity Fundamentals Specialist Training Course
NEW QUESTION # 42
As related to IACS Maintenance Service Providers, when do maintenance activities generally start?
- A. After the handover of the solution
- B. During the design phase
- C. At the beginning of the project
- D. Before the handover of the solution
Answer: A
Explanation:
In the context of ISA/IEC 62443, maintenance activities by IACS Maintenance Service Providers generally begin after the solution (such as a control system or automation project) is handed over to the asset owner.
This marks the transition from project (installation and commissioning) to operational maintenance, which includes patching, updating, and other support activities as part of the system lifecycle.
Reference: ISA/IEC 62443-2-4:2015, Section 4.3.3 ("Service provider maintenance activities after handover").
NEW QUESTION # 43
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. Defense-in-depth approach to designing
- B. Well-documented security policies and procedures
- C. Aligned development process
- D. Aligned needs of industrial users
Answer: A
NEW QUESTION # 44
Which of the following is an example of separation of duties as a part of system development and
maintenance?
Available Choices (select all choices that are correct)
- A. Configuration settings are made by one party and self-reviewed using a checklist.
- B. Design and implementation are performed by the same team.
- C. Developers write and then test their own code.
- D. Changes are approved by one party and implemented by another.
Answer: D
NEW QUESTION # 45
What.are the two elements of the risk analysis category of an IACS?
Available Choices (select all choices that are correct)
- A. Risk evaluation and risk identification
- B. Business rationale and risk reduction and avoidance
- C. Business recovery and risk elimination or mitigation
- D. Business rationale and risk identification and classification
Answer: D
NEW QUESTION # 46
Electronic security, as defined in ANSI/ISA-99.00.01:2007. includes which of the following?
Available Choices (select all choices that are correct)
- A. Security guidelines for the proper configuration of IACS PLCs and other programmable configurable components of the system
- B. Computers, networks, operating systems, applications, and other programmable configurable components of the system
- C. Personnel, policies, and procedures related to the security of computers, networks. PLCs, and other programmable configurable components of the system
- D. Security guidelines for the proper configuration of IACS computers and operating systems
Answer: B,C
Explanation:
In ANSI/ISA-99.00.01:2007, which is part of the ISA/IEC 62443 standards, electronic security encompasses both the technical and human aspects of cybersecurity within industrial automated and control systems (IACS). Option B correctly highlights components such as computers, networks, operating systems, applications, and other programmable configurable components which are intrinsic to the system's electronic security framework. Option C is also correct as it includes the personnel, policies, andprocedures which play a crucial role in securing these systems. This emphasizes that security is not only about the technological solutions but also about managing human elements and organizational processes effectively.ISA/IEC 62443 Cybersecurity Fundamentals References:
* ISA/IEC 62443 standards focus on the holistic nature of security which is clearly supported by including both the technological (Option B) and human elements (Option C) in the definition of electronic security.
NEW QUESTION # 47
What is the definition of "defense in depth" when referring to
Available Choices (select all choices that are correct)
- A. Applying multiple countermeasures in a layered or stepwise manner
- B. Aligning all resources to provide a broad technical gauntlet
- C. Using countermeasures that have intrinsic technical depth.
- D. Requiring a minimum distance requirement between security assets
Answer: A
NEW QUESTION # 48
What is the primary focus of Part 3-2 in the ISA/IEC 62443 series?
- A. Cybersecurity risk assessment and system design
- B. Secure product development lifecycle requirements
- C. Security technologies for IACS
- D. Technical security requirements for IACS components
Answer: A
Explanation:
ISA/IEC 62443-3-2 is titled "Security risk assessment for system design" and provides a methodology for performing cybersecurity risk assessments and for the design of security zones and conduits within IACS. It describes how to identify assets, assess threats and vulnerabilities, assign Security Levels (SLs), and develop a security design based on risk.
Reference: ISA/IEC 62443-3-2:2020, Scope and Section 4.1 ("Purpose and objectives of 62443-3-2").
NEW QUESTION # 49
Which is a role of the application layer?
Available Choices (select all choices that are correct)
- A. Provides the mechanism for opening, closing, and managing a session between end-user application processes
- B. Delivers and formats information, possibly with encryption and security
- C. Includes protocols specific to network applications such as email, file transfer, and reading data registers in a PLC
- D. Includes user applications specific to network applications such as email, file transfer, and reading data registers in a PLC
Answer: B,C
Explanation:
The application layer is the topmost layer of the OSI model, which provides the interface between the user and the network. It includes protocols specific to network applications such as email, file transfer, and reading data registers in a PLC. These protocols deliver and format information, possibly with encryption and security, to ensure reliable and meaningful communication between different applications. The application layer does not include user applications, which are separate from the network protocols. The application layer also does not provide the mechanism for opening, closing, and managing a session between end-user application processes, which is the function of the session layer. References:
* ISA/IEC 62443 Cybersecurity Fundamentals Specialist Study Guide, page 181
* Using the ISA/IEC 62443 Standards to Secure Your Control System, page 82 The application layer in network protocols, such as in the OSI model or the TCP/IP protocol suite, is primarily responsible for providing services directly to user applications. This layer is involved in:
* Option A: Including protocols specific to network applications such as email, file transfer, and industrial protocols like reading data registers in a Programmable Logic Controller (PLC). This is a core function of the application layer as it facilitates specific high-level networking capabilities.
* Option D: Delivering and formatting information, which can include encryption and ensuring the security of data as it is transmitted across the network. This includes protocols like HTTP for web browsing which can encrypt data via HTTPS, SMTP for secure email transmission, and FTP for secure file transfer.
NEW QUESTION # 50
Which of the following is the BEST example of detection-in-depth best practices?
Available Choices (select all choices that are correct)
- A. Role-based access control and unusual data transfer patterns
- B. Firewalls and unexpected protocols being used
- C. IDS sensors deployed within multiple zones in the production environment
- D. Role-based access control and VPNs
Answer: C
Explanation:
The best practice for detection-in-depth according to ISA/IEC 62443 involves layering different types of security controls that operate effectively under multiple scenarios and across various zones within an environment. IDS (Intrusion Detection Systems) sensors deployed across multiple zones within a production environment exemplify this strategy. By positioning sensors in various strategic locations, organizations can monitor for anomalous activities and potential threats throughout their network, thus enhancing their ability to detect and respond to incidents before they escalate. This deployment aligns with the ISA/IEC 62443 focus on comprehensive coverage and redundancy in cybersecurity mechanisms, contrasting with relying solely on perimeter defenses or single-point security solutions.
NEW QUESTION # 51
Which communications system covers a large geographic area?
Available Choices (select all choices that are correct)
- A. Local Area Network (LAN)
- B. Storage Area Network
- C. Campus Area Network (CAN)
- D. Wide Area Network (WAN)
Answer: D
NEW QUESTION # 52
Which of the following is an element of monitoring and improving a CSMS?
Available Choices (select all choices that are correct)
- A. Review of system logs and other key data files
- B. Restricted access to the industrial control system to an as-needed basis
- C. Increase in staff training and security awareness
- D. Significant changes in identified risk round in periodic reassessments
Answer: A,C
Explanation:
Monitoring and improving a Cybersecurity Management System (CSMS) as per ISA/IEC 62443 standards involves several key activities that ensure the system remains effective and responsive to emerging threats.
Two critical elements of this ongoing process are:
* A. Increase in staff training and security awareness:Regular training and increasing security awareness among staff are vital to maintaining a secure operating environment. This proactive measure helps in reducing human error and enhancing the ability to respond effectively to cybersecurity incidents.
* D. Review of system logs and other key data files:Continuous review and analysis of system logs and other relevant data files are essential for detecting, investigating, and responding to potential security incidents. This monitoring helps in identifying anomalies that may indicate a security breach or operational issues needing attention.
NEW QUESTION # 53
Why is patch management more difficult for IACS than for business systems?
Available Choices (select all choices that are correct)
- A. Many more approvals are required.
- B. Patching a live automation system can create safety risks.
- C. Business systems automatically update.
- D. Overtime pay is required for technicians.
Answer: B
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 # 54
Which of the following is a recommended default rule for IACS firewalls?
Available Choices (select all choices that are correct)
- A. Block all traffic by default.
- B. Allow all traffic by default.
- C. Allow IACS devices to access the Internet.
- D. Allow traffic directly from the IACS network to the enterprise network.
Answer: A
NEW QUESTION # 55
Which is an important difference between IT systems and IACS?
Available Choices (select all choices that are correct)
- A. Routers are not used in IACS networks.
- B. The IACS security priority is integrity.
- C. IACS cybersecurity must address safety issues.
- D. The IT security priority is availability.
Answer: B,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 # 56
What.are the two elements of the risk analysis category of an IACS?
Available Choices (select all choices that are correct)
- A. Risk evaluation and risk identification
- B. Business rationale and risk reduction and avoidance
- C. Business recovery and risk elimination or mitigation
- D. Business rationale and risk identification and classification
Answer: D
Explanation:
The risk analysis category of an IACS consists of two elements: business rationale and risk identification and classification1. Business rationale is the process of defining the scope, objectives, and criteria for the risk analysis, as well as the roles and responsibilities of the stakeholders involved. Risk identification and classification is the process of identifying the assets, threats, vulnerabilities, and consequences of a cyberattack on the IACS, and assigning a risk level to each scenario based on the likelihood and impact of the attack1. These elements are essential for establishing a baseline of the current risk posture of the IACS and determining the appropriate risk treatment measures to reduce the risk to an acceptable level. References: 1:
ISA/IEC 62443-3-2:2020, Security for industrial automation and control systems - Part 3-2: Security risk assessment for system design, International Society of Automation, Research Triangle Park, NC, USA, 2020.
NEW QUESTION # 57
Which of the following technologies is no longer considered secure?
- A. Digital Encryption Standard (DES)
- B. Transport Layer Security (TLS)
- C. Advanced Encryption Standard (AES)
- D. Secure Sockets Layer (SSL)
Answer: D
Explanation:
Secure Sockets Layer (SSL) is no longer considered secure due to known vulnerabilities and cryptographic weaknesses. Modern standards require the use of newer versions of Transport Layer Security (TLS), and similarly, DES is deprecated for strong security. However, the best and most universally referenced example is SSL, as major industry and regulatory bodies recommend disabling SSL entirely in favor of TLS 1.2 or above.
Reference: ISA/IEC 62443-3-3:2013, Section 4.2.3.7 ("Cryptographic protections"); NIST SP 800-52 Rev. 2.
NEW QUESTION # 58
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