[Mar 30, 2025] ISA ISA-IEC-62443 Exam Dumps Are Essential To Get Good Marks

Latest ISA ISA-IEC-62443 Dumps with Test Engine and PDF (New Questions)

NEW QUESTION # 38
Why is OPC Classic considered firewall unfriendly?
Available Choices (select all choices that are correct)

• A. OPC Classic uses DCOM, which dynamically assigns any port between 1024 and 65535.
• B. OPC Classic is an obsolete communication standard.
• C. OPC Classic is allowed to use only port 80.
• D. OPC Classic works with control devices from different manufacturers.

Answer: A

NEW QUESTION # 39
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. Operations Department
• B. Legal Department
• C. Safety 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 # 40
Which of the following attacks relies on a human weakness to succeed?
Available Choices (select all choices that are correct)

• A. Escalation-of-privileges
• B. Phishing
• C. Spoofing
• D. Denial-of-service

Answer: B

NEW QUESTION # 41
What.are the two elements of the risk analysis category of an IACS?
Available Choices (select all choices that are correct)

• A. Business rationale and risk identification and classification
• B. Risk evaluation and risk identification
• C. Business rationale and risk reduction and avoidance
• D. Business recovery and risk elimination or mitigation

Answer: A

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 # 42
Which is a physical layer standard for serial communications between two or more devices?
Available Choices (select all choices that are correct)

• A. RS432
• B. RS435
• C. RS232
• D. RS235

Answer: B

NEW QUESTION # 43
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

NEW QUESTION # 44
What is defined as the hardware and software components of an IACS?
Available Choices (select all choices that are correct)

• A. Electronic security
• B. Control system
• C. COTS software and hardware
• D. Cybersecuritv

Answer: B

Explanation:
According to the ISA/IEC 62443-1-1 standard, an industrial automation and control system (IACS) is defined as a collection of personnel, hardware, and software that can affect or influence the safe, secure, and reliable operation of an industrial process. The hardware and software components of an IACS include the control system, which is the combination of control devices, networks, and applications that perform the control functions for the industrial process. The control system may consist of various types of devices, such as distributed control systems (DCS), programmable logic controllers (PLC), supervisory control and data acquisition (SCADA) systems, human-machine interfaces (HMI), remote terminal units (RTU), intelligent electronic devices (IED), sensors, actuators, and other field devices. The control system may also use commercial off-the-shelf (COTS) software and hardware, such as operating systems, databases, firewalls, routers, switches, and servers, to support the control functions and communication.
References:
* ISA/IEC 62443-1-1:2009, Security for industrial automation and control systems - Part 1-1:
Terminology, concepts and models, Clause 3.2.11
* ISA/IEC 62443-2-1:2010, Security for industrial automation and control systems - Part 2-1: Establishing an industrial automation and control systems security program, Clause 3.2.12

NEW QUESTION # 45
What is the name of the protocol that implements serial Modbus over Ethernet?
Available Choices (select all choices that are correct)

• A. MODBUS/Plus
• B. MODBUS/Ethernet
• C. MODBUS/CIP
• D. MODBUS/TCP

Answer: D

NEW QUESTION # 46
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 development process
• B. Defense-in-depth approach to designing
• C. Aligned needs of industrial users
• D. Well-documented security policies and procedures

Answer: B

NEW QUESTION # 47
What is the definition of "defense in depth" when referring to
Available Choices (select all choices that are correct)

• A. Requiring a minimum distance requirement between security assets
• B. Aligning all resources to provide a broad technical gauntlet
• C. Applying multiple countermeasures in a layered or stepwise manner
• D. Using countermeasures that have intrinsic technical depth.

Answer: C

Explanation:
Defense in depth is a concept of cybersecurity that involves applying multiple layers of protection to a system or network, so that if one layer fails, another layer can prevent or mitigate an attack. Defense in depth is based on the principle that no single security measure is perfect or sufficient, and that multiple countermeasures can provide redundancy and diversity of defense. Defense in depth can also increase the cost and complexity for an attacker, as they have to overcome more obstacles and exploit more vulnerabilities to achieve their goals.
Defense in depth is one of the key concepts of the ISA/IEC 62443 series of standards, which provide guidance and best practices for securing industrial automation and control systems (IACS). The standards recommend applying defense in depth strategies at different levels of an IACS, such as the network, the system, the component, and the policy and procedure level. The standards also define different zones and conduits within an IACS, which are logical or physical groupings of assets that share common security requirements and risk levels. By applying defense in depth strategies to each zone and conduit, the security of the entire IACS can be improved. References:
* ISA/IEC 62443-1-1:2009, Security for industrial automation and control systems - Part 1-1:
Terminology, concepts and models1
* ISA/IEC 62443-3-3:2013, Security for industrial automation and control systems - Part 3-3: System security requirements and security levels2
* ISA/IEC 62443-4-1:2018, Security for industrial automation and control systems - Part 4-1: Product security development life-cycle requirements3
* ISA/IEC 62443-4-2:2019, Security for industrial automation and control systems - Part 4-2: Technical security requirements for IACS components4

NEW QUESTION # 48
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. Application layer
• B. Data link layer
• C. Session layer
• D. Transport layer

Answer: A

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 # 49
After receiving an approved patch from the JACS vendor, what is BEST practice for the asset owner to
follow?
vailable Choices (select all choices that are correct)

• A. If a low priority, there is no need to apply the patch.
• B. If no problems are experienced with the current IACS, it is not necessary to apply the patch.
• C. If a medium priority, schedule the installation within three months after receipt.
• D. If a high priority, apply the patch at the first unscheduled outage.

Answer: C

NEW QUESTION # 50
Which layer specifies the rules for Modbus Application Protocol
Available Choices (select all choices that are correct)

• A. Application layer
• B. Data link layer
• C. Session layer
• D. Presentation layer

Answer: A

NEW QUESTION # 51
Which of the following are the critical variables related to access control?
Available Choices (select all choices that are correct)

• A. Account management and monitoring
• B. Account management and password strength
• C. Password strength and change frequency
• D. Reporting and monitoring

Answer: B

NEW QUESTION # 52
Which analysis method is MOST frequently used as an input to a security risk assessment?
Available Choices (select all choices that are correct)

• A. Failure Mode and Effects Analysis
• B. System Safety Analysis(SSA)
• C. Process Hazard Analysis (PHA)
• D. Job Safety Analysis(JSA)

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 # 53
The Risk Analysis category contains background information that is used where?
Available Choices (select all choices that are correct)

• A. Only the Assessment element
• B. (Elements external to the CSMS
• C. Many other elements in the CSMS
• D. Only the Risk ID element

Answer: C

Explanation:
The Risk Analysis category contains background information that is used to identify and assess the risks associated with the cyber-physical system (CPS) under consideration. This information includes the system description, the threat model, the vulnerability analysis, the risk assessment method, and the risk acceptance criteria. The Risk Analysis category is used as an input for many other elements in the CSMS, such as the Risk ID, Risk Reduction, Risk Acceptance, and Risk Monitoring elements. The Risk Analysis category provides the basis for the risk management process and helps to ensure a consistent and systematic approach to cybersecurity in the CPS. References:
* Using the ISA/IEC 62443 Standards to Secure Your Control System, page 13
* [ISA/IEC 62443 Cybersecurity Fundamentals Specialist Study Guide], page 34

NEW QUESTION # 54
Which communications system covers a large geographic area?
Available Choices (select all choices that are correct)

• A. Campus Area Network (CAN)
• B. Storage Area Network
• C. Wide Area Network (WAN)
• D. Local Area Network (LAN)

Answer: C

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 # 55
Which of the following is the BEST example of detection-in-depth best practices?
Available Choices (select all choices that are correct)

• A. IDS sensors deployed within multiple zones in the production environment
• B. Firewalls and unexpected protocols being used
• C. Role-based access control and VPNs
• D. Role-based access control and unusual data transfer patterns

Answer: A

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 # 56
Which is a physical layer standard for serial communications between two or more devices?
Available Choices (select all choices that are correct)

• A. RS432
• B. RS232
• C. RS435
• D. RS235

Answer: B

Explanation:
RS232 is a physical layer standard for serial communication between two or more devices. It defines the electrical characteristics, timing, and pinout of connectors for serial data transmission. RS232 is widely used in industrial communication devices, such as PLCs, measuring instruments, and network servers. RS232 allows only one master and one slave to communicate on each line, and operates in a full duplex mode. RS232 haslower transmission speed, shorter maximum cable length, and larger voltage swing than later standards such as RS422 and RS485123 References: 1: Basics of RS232, RS422, and RS485 Serial Communication 2: RS-232 - Wikipedia 3: RS232 Serial Communication Protocol: Basics, Working & Specifications

NEW QUESTION # 57
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. Organizational restructuring
• C. Security incident exposing previously unknown risk.
• D. Budgeting

Answer: C

NEW QUESTION # 58
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. Knowledge of exploits and tools readily available on the Internet
• C. Fewer personnel with system knowledge having access to IACS
• D. The move away from commercial off the shelf (COTS) systems, protocols, and networks

Answer: D

NEW QUESTION # 59
What is the purpose of ISO/IEC 15408 (Common Criteria)?
Available Choices (select all choices that are correct)

• A. To define a security management organization
• B. To describe what constitutes a secure product
• C. To describe a process for risk management
• D. To define a product development evaluation methodology

Answer: D

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 # 60
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