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Free ISA-IEC-62443 Sample Questions and 100% Cover Real Exam Questions (Updated 90 Questions)
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. Design security level
- B. Target security level
- C. Capability security level
- D. Achieved security level
Answer: C
NEW QUESTION # 52
What are three possible entry points (pathways) that could be used for launching a cyber attack?
Available Choices (select all choices that are correct)
- A. LAN, portable media, and wireless
- B. LAN, WAN, and hard drive
- C. LAN, portable media, and hard drives
- D. LAN, power source, and wireless OD.
Answer: A
NEW QUESTION # 53
What do packet filter firewalls examine?
Available Choices (select all choices that are correct)
- A. The packet structure and sequence
- B. Every incoming packet up to the application layer
- C. Only the source, destination, and ports in the header of each packet
- D. The relationships between packets in a session
Answer: C
Explanation:
Packet filter firewalls, as defined by ISA/IEC 62443 standards on cybersecurity, primarily examine the source, destination, and ports in the header of each packet. This type of firewall does not inspect the packet content deeply (such as its structure or sequence) or maintain awareness of the relationships between packets in a session. Instead, it operates at a more superficial level, filtering packets based solely on IP addresses and TCP/UDP ports. This approach allows packet filter firewalls to quickly process and either accept or block packets based on these predefined criteria without delving into the complexities of session management or the content of the packets up to the application layer.
NEW QUESTION # 54
Which is the implementation of PROFIBUS over Ethernet for non-safety-related communications?
Available Choices (select all choices that are correct)
- A. PROFINET
- B. PROFIBUS PA
- C. PROF1SAFE
- D. PROFIBUS DP
Answer: A
Explanation:
PROFINET is the implementation of PROFIBUS over Ethernet for non-safety-related communications. It is a standard for industrial Ethernet that enables real-time data exchange between automation devices, controllers, and higher-level systems. PROFINET uses standard Ethernet hardware and software, but adds a thin software layer that allows deterministic and fast communication. PROFINET supports different communication profiles for different applications, such as motion control, process automation, and functional safety. PROFINET is compatible with PROFIBUS, and allows seamless integration of existing PROFIBUS devices and networks123 References: 1: What is PROFINET? - PI North America 2: PROFINET - Wikipedia 3: PROFINET Technology and Application - System Description
NEW QUESTION # 55
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/Ethernet
- C. MODBUS/CIP
- D. MODBUS/Plus
Answer: A
NEW QUESTION # 56
Which organization manages the ISASecure conformance certification program?
Available Choices (select all choices that are correct)
- A. Security Compliance Institute
- B. American Society for Industrial Security
- C. Automation Federation
- D. National Institute of Standards and Technology
Answer: A
Explanation:
The ISASecure conformance certification program is managed by the Security Compliance Institute (ISCI), a non-profit organization established in 2007 by a group of industry stakeholders, including end users, suppliers, and integrators. ISCI's mission is to provide a common industry-accepted set of device and process requirements that drive device security, simplifying procurement for asset owners and device assurance for equipment vendors12. References: 1: ISASecure - IEC 62443 Conformance Certification - Official Site 2:
Certifications - ISASecure
NEW QUESTION # 57
What is OPC?
Available Choices (select all choices that are correct)
- A. A vendor-specific proprietary protocol for the communication of real-time plant data between control devices
- B. An open standard protocol for real-time field bus communication between automation technology devices
- C. An open standard serial communications protocol widely used in industrial manufacturing environments
- D. An open standard protocol for the communication of real-time data between devices from different manufacturers
Answer: D
Explanation:
OPC stands for Open Platform Communications, and it is a series of standards and specifications for industrial telecommunication based on Object Linking and Embedding (OLE) for process control. It allows the communication of real-time data between devices from different manufacturers using various data transportation technologies, such as Microsoft's OLE, COM, DCOM, .NET, XML, and TCP123. OPC is not a protocolitself, but rather a standardized approach for data connectivity supported by the OPC Foundation3. OPC is widely used in industrial automation and control systems, as well as other industries, to achieve interoperability and integration between different applications and devices3.
A is incorrect, because OPC is not a field bus protocol, but rather a standard for data exchange between devices that may use different field bus protocols, such as Modbus, Profibus, or Ethernet/IP2. C is incorrect, because OPC is not a serial communications protocol, but rather a standard that can use various data transportation technologies, including serial, Ethernet, or wireless2. D is incorrect, because OPC is not a vendor-specific proprietary protocol, but rather an open standard that can be implemented by any vendor or device that supports the OPC specifications3. References: 1: Open Platform Communications - Wikipedia 2: What is OPC Protocol - The Automization 3: What is OPC? - OPC Foundation
NEW QUESTION # 58
Which of the following refers to internal rules that govern how an organization protects critical system resources?
Available Choices (select all choices that are correct)
- A. Legislation
- B. Security policy
D- Code of conduct - C. Formal guidance
Answer: B
Explanation:
A security policy refers to internal rules that govern how an organization protects critical system resources, such as industrial control systems (ICS). A security policy defines the objectives, scope, roles, responsibilities, and requirements for securing the ICS environment, as well as the procedures and guidelines for implementing, monitoring, and enforcing the security measures. A security policy also establishes the baseline for assessing and managing the security risks to the ICS, and for ensuring compliance with relevant standards, regulations, and best practices. A security policy is a key component of the ICS security program, and it should be documented, communicated, and reviewed regularly.
The other choices are not correct because:
* A. Formal guidance. Formal guidance refers to external sources of information and recommendations that can help an organization improve its ICS security posture, such as standards, frameworks, guidelines, and best practices. Formal guidance is not an internal rule, but rather a reference that can be used to develop, implement, and evaluate the security policy and controls. For example, the ISA/IEC
62443 series of standards provide formal guidance on how to secure ICS from cyber threats1.
* B. Legislation. Legislation refers to external laws and regulations that impose legal obligations and penalties on an organization for its ICS security performance, such as the NERC CIP standards for the electric sector2, or the EU NIS Directive for critical infrastructure operators3. Legislation is not an internal rule, but rather a compliance requirement that must be met by the organization. Legislation may also influence the security policy and controls, as the organization needs to align its security objectives and practices with the legal expectations and consequences.
* D. Code of conduct. A code of conduct refers to a set of ethical principles and values that guide the
* behavior and decision-making of an organization and its employees, such as honesty, integrity, respect, and accountability. A code of conduct is not an internal rule for protecting critical system resources, but rather a general norm for conducting business and maintaining a positive reputation. A code of conduct may also support the security policy and culture, as it can foster a sense of responsibility and trust among the ICS stakeholders.
References:
* 1: ISA/IEC 62443 Standards to Secure Your Industrial Control System
* 2: NERC Critical Infrastructure Protection Standards
* 3: EU Network and Information Systems Directive
NEW QUESTION # 59
Why is patch management more difficult for IACS than for business systems?
Available Choices (select all choices that are correct)
- A. Overtime pay is required for technicians.
- B. Patching a live automation system can create safety risks.
- C. Business systems automatically update.
- D. Many more approvals are required.
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 # 60
In which layer is the physical address assigned?
Available Choices (select all choices that are correct)
- A. Layer 3
- B. Layer 2
- C. Layer 1
- D. Layer 7
Answer: B
NEW QUESTION # 61
What.are the two elements of the risk analysis category of an IACS?
Available Choices (select all choices that are correct)
- A. Business recovery and risk elimination or mitigation
- B. Business rationale and risk reduction and avoidance
- C. Business rationale and risk identification and classification
- D. Risk evaluation and risk identification
Answer: C
NEW QUESTION # 62
Which analysis method is MOST frequently used as an input to a security risk assessment?
Available Choices (select all choices that are correct)
- A. Job Safety Analysis(JSA)
- B. System Safety Analysis(SSA)
- C. Process Hazard Analysis (PHA)
- D. Failure Mode and Effects Analysis
Answer: C
NEW QUESTION # 63
Which characteristic is MOST closely associated with the deployment of a demilitarized zone (DMZ)?
Available Choices (select all choices that are correct)
- A. Level 4 systems must use the DMZ to communicate with Level 3 and below.
- B. Internet access through the firewall is allowed.
- C. Email is prevented, thereby mitigating the risk of phishing attempts.
- D. Level 0 can only interact with Level 1 through the firewall.
Answer: B
Explanation:
In cybersecurity, a demilitarized zone (DMZ) refers to a physical or logical subnetwork that contains and exposes an organization's external-facing services to an untrusted network, typically the internet. The main characteristic of a DMZ is that it acts as a buffer zone between the public internet and the private network.
This allows for internet access through the firewall while keeping the internal network secure. Internet-facing servers are placed in the DMZ so that they are separated from the rest of the internal network. By doing so, if a server in the DMZ is compromised, the attacker would not have direct access to the internal network. This architecture is commonly used to host services such as web servers, mail servers, and FTP servers. Choice C is the most closely associated with the deployment of a DMZ as it allows for regulated and monitored internet access through a firewall.
NEW QUESTION # 64
Which of the following is the underlying protocol for Ethernet/IP?
Available Choices (select all choices that are correct)
- A. Highway Addressable Remote Transducer (HART)
- B. Building Automation and Control Network (BACnet)
- C. Object Linking and Embedding (OLE) for Process Control
- D. Common Industrial Protocol
Answer: D
NEW QUESTION # 65
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. Developers write and then test their own code.
- B. Configuration settings are made by one party and self-reviewed using a checklist.
- C. Changes are approved by one party and implemented by another.
- D. Design and implementation are performed by the same team.
Answer: C
Explanation:
Separation of duties is a security principle that aims to prevent fraud, errors, conflicts of interest, or misuse of resources by dividing critical tasks or functions among different people or teams. It is one of the foundational requirements (FRs) of the ISA/IEC 62443 standards for securing industrial automation and control systems (IACSs). According to the ISA/IEC 62443-2-1 standard, separation of duties includes the following system requirements (SRs):
* SR 2.1: Security management policy
* SR 2.2: Personnel security
* SR 2.3: System development and maintenance
* SR 2.4: Incident response and recovery
* SR 2.5: Compliance and review
Among these SRs, the one that is most related to the example of system development and maintenance is SR
2.3. SR 2.3 requires that the IACS shall provide the capability to ensure that the development and maintenance of the system and its components are performed in a secure manner. This means that the IACS should have a mechanism to control the access and authorization of developers, testers, integrators, and maintainers who work on the system and its components. It also means that the IACS should have a mechanism to verify and validate the quality and security of the system and its components before, during, and after the development and maintenance processes.
Therefore, an example of separation of duties as a part of system development and maintenance is that changes are approved by one party and implemented by another. This ensures that the changes are authorized, documented, and reviewed by someone who is not involved in the implementation. This reduces the risk of introducing errors, vulnerabilities, or malicious code into the system and its components.
References:
* ISA/IEC 62443-2-1:2010, Security for industrial automation and control systems - Part 2-1: Establishing an industrial automation and control systems security program1
* ISA/IEC 62443 Cybersecurity Fundamentals Specialist Certificate Program2
* ISA/IEC 62443 Cybersecurity Library3
* Using the ISA/IEC 62443 Standards to Secure Your Control Systems4
NEW QUESTION # 66
What are the two sublayers of Layer 2?
Available Choices (select all choices that are correct)
- A. HIDS and NIDS
- B. VLAN and VPN
- C. LLC and MAC
- D. OPC and DCOM
Answer: C
Explanation:
Layer 2 of the OSI model is the data link layer, which is responsible for transferring data frames between nodes on a network segment. The data link layer is divided into two sublayers: logical link control (LLC) and media access control (MAC). The LLC sublayer deals with issues common to both dedicated and broadcast links, such as framing, flow control, and error control. The MAC sublayer deals with issues specific to broadcast links, such as how to access the shared medium and avoid collisions. The LLC and MAC sublayers are not related to the ISA/IEC 62443 cybersecurity standards, which focus on the security of industrial automation and control systems (IACS). References:https://www.baeldung.com/cs/data-link-sub-layers
https://bing.com/search?q=Layer+2+sublayers
NEW QUESTION # 67
What does Layer 1 of the ISO/OSI protocol stack provide?
Available Choices (select all choices that are correct)
- A. The electrical and physical specifications of the data connection
- B. Framing, converting electrical signals to data, and error checking
- C. User applications specific to network applications such as reading data registers in a PLC
- D. Data encryption, routing, and end-to-end connectivity
Answer: A
Explanation:
Layer 1 of the ISO/OSI protocol stack is the physical layer, which provides the means of transmitting and receiving raw data bits over a physical medium. It defines the electrical and physical specifications of the data connection, such as the voltage levels, signal timing, cable types, connectors, and pin assignments. It does not perform any data encryption, routing, end-to-end connectivity, framing, error checking, or user applications. These functions are performed by higher layers of the protocol stack, such as the data link layer, the network layer, the transport layer, and the application layer. References: ISO/IEC 7498-1:1994, Section
6.11; ISA/IEC 62443 Cybersecurity Fundamentals Specialist Study Guide, Section 3.1.12
NEW QUESTION # 68
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