ISA Cybersecurity ISA-IEC-62443 Practice Test Engine: Try These 90 Exam Questions
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NEW QUESTION # 19
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 protocol for the communication of real-time data between devices from different manufacturers
- D. An open standard serial communications protocol widely used in industrial manufacturing environments
Answer: C
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 # 20
Which of the following is the BEST reason for periodic audits?
Available Choices (select all choices that are correct)
- A. To confirm audit procedures
- B. To adhere to a published or approved schedule
- C. To validate that security policies and procedures are performing
- D. To meet regulations
Answer: C
NEW QUESTION # 21
Which of the following is an element of security policy, organization, and awareness?
Available Choices (select all choices that are correct)
- A. Penetration testing
- B. Product development requirements
- C. Staff training and security awareness
- D. Technical requirement assessment
Answer: D
NEW QUESTION # 22
Which steps are part of implementing countermeasures?
Available Choices (select all choices that are correct)
- A. Establish the risk tolerance and select common countermeasures.
- B. Select common countermeasures and update the business continuity plan.
- C. Select common countermeasures and collaborate with stakeholders.
- D. Establish the risk tolerance and update the business continuity plan.
Answer: A
Explanation:
According to the ISA/IEC 62443-3-2 standard, implementing countermeasures is one of the steps in the security risk assessment for system design. The standard defines a comprehensive set of engineering measures to guide organizations through the process of assessing the risk of a particular industrial automation and control system (IACS) and identifying and applying security countermeasures to reduce that risk to tolerable levels. The standard recommends the following steps for implementing countermeasures:
* Establish the risk tolerance: This step involves determining the acceptable level of risk for the organization and the system under consideration, based on the business objectives, legal and regulatory requirements, and stakeholder expectations. The risk tolerance can be expressed as a target security level (SL-T) for each zone or conduit in the system.
* Select common countermeasures: This step involves selecting the appropriate security countermeasures for each zone or conduit, based on the SL-T and the existing security level (SL-A) of the system. The standard provides a list of common countermeasures for each security level, covering the domains of physical security, network security, system security, and application security. The selected countermeasures should be documented and justified in the security risk assessment report. References:
ISA/IEC 62443 Cybersecurity Series Designated as IEC Horizontal Standards, Cybersecurity Risk Assessment According to ISA/IEC 62443-3-2
NEW QUESTION # 23
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 traffic directly from the IACS network to the enterprise network.
- C. Allow all traffic by default.
- D. Allow IACS devices to access the Internet.
Answer: A
Explanation:
A recommended default rule for IACS firewalls is to block all traffic by default, and then allow only the necessary and authorized traffic based on the security policy and the zone and conduit model. This is also known as the principle of least privilege, which means granting the minimum access required for a legitimate purpose. Blocking all traffic by default provides a higher level of security and reduces the attack surface of the IACS network. The other choices are not recommended default rules for IACS firewalls, as they may expose the IACS network to unnecessary risks. Allowing all traffic by default would defeat the purpose of a firewall, as it would not filter any malicious or unwanted traffic. Allowing IACS devices to access the Internet would expose them to potential cyber threats, such as malware, phishing, or denial-of-service attacks. Allowing traffic directly from the IACS network to the enterprise network would bypass the demilitarized zone (DMZ), which is a buffer zone that isolates the IACS network from the enterprise network and hosts services that need to communicate between them. References:
* ISA/IEC 62443 Standards to Secure Your Industrial Control System training course1
* ISA/IEC 62443 Cybersecurity Fundamentals Specialist Study Guide2
* Using the ISA/IEC 62443 Standard to Secure Your Control Systems3
NEW QUESTION # 24
Multiuser accounts and shared passwords inherently carry which of the followinq risks?
Available Choices (select all choices that are correct)
- A. Unauthorized access
- B. Privilege escalation
- C. Race conditions
- D. Buffer overflow
Answer: B
NEW QUESTION # 25
Which is a role of the application layer?
Available Choices (select all choices that are correct)
- A. Delivers and formats information, possibly with encryption and security
- B. Provides the mechanism for opening, closing, and managing a session between end-user application processes
- 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: A,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 # 26
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. Overtime pay is required for technicians.
- C. Patching a live automation system can create safety risks.
- D. Business systems automatically update.
Answer: C
NEW QUESTION # 27
Which of the following is an industry sector-specific standard?
Available Choices (select all choices that are correct)
- A. NIST SP800-82
- B. ISA-62443 (EC 62443)
- C. D. ISO 27001
- D. API 1164
Answer: D
Explanation:
API 1164 is an industry sector-specific standard that provides guidance on the cybersecurity of pipeline supervisory control and data acquisition (SCADA) systems. API stands for American Petroleum Institute, which is the largest U.S. trade association for the oil and natural gas industry. API 1164 was first published in
2004 and revised in 2009 and 2021. The latest version of the standard aligns with the ISA/IEC 62443 series of standards and incorporates the concepts of security levels, zones, and conduits. API 1164 covers the security lifecycle of pipeline SCADA systems, from risk assessment and policy development to implementation and maintenance. The standard also defines roles and responsibilities, security requirements, security controls, and security assessment methods for pipeline SCADA systems.
References:
* API 1164: Pipeline SCADA Security, Fourth Edition, September 2021
* ISA/IEC 62443 Cybersecurity Fundamentals Specialist Study Guide, Section 2.2.2, Industry Sector-Specific Standards
* ISA/IEC 62443 Cybersecurity Fundamentals Specialist Exam Specification, Section 2.2.2, Industry Sector-Specific Standards
NEW QUESTION # 28
Which of the following PRIMARILY determines access privileges for user accounts?
Available Choices (select all choices that are correct)
- A. Common practice
- B. Authorization security policy
- C. Users' desire for ease of use
- D. Technical capability
Answer: B
Explanation:
Authorization security policy is the primary factor that determines access privileges for user accounts. Authorization security policy is the function of specifying access rights or privileges to resources, which is related to general information security and computer security, and to accesscontrol in particular1.
Authorization security policy defines who can access what resources, under what conditions, and for what purposes. Authorization security policy should be aligned with the business objectives and security requirements of the organization, and should be enforced by appropriate mechanisms and controls. Authorization security policy should also be reviewed and updated regularly to reflect changes in the environment, threats, and risks2. Authorization security policy is an essential part of the ISA/IEC 62443 standard, which provides a framework for securing industrial automation and control systems (IACS). The standard defines four security levels (SL) that represent the degree of protection against threats, and specifies the security capabilities that should be implemented for each SL. The standard also provides guidance on how to conduct a security risk assessment, how to define security zones and conduits, and how to apply security policies and procedures to the IACS environment34 . References:https://bing.com/search?q=authorization+security+policy
https://learn.microsoft.com/en-us/aspnet/core/security/authorization/policies?view=aspnetcore-7.0
NEW QUESTION # 29
Which factor drives the selection of countermeasures?
Available Choices (select all choices that are correct)
- A. Security levels
- B. Output from a risk assessment
- C. System design
- D. Foundational requirements
Answer: B
NEW QUESTION # 30
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. Common Industrial Protocol
- C. Object Linking and Embedding (OLE) for Process Control
- D. Building Automation and Control Network (BACnet)
Answer: B
Explanation:
Ethernet/IP is an industrial network protocol that adapts the Common Industrial Protocol (CIP) to standard Ethernet. CIP is an object-oriented protocol that provides a unified communication architecture for various industrial automation applications, such as control, safety, security, energy, synchronization and motion, information and network management. CIP defines a set of messages and services for interacting with devices and data on the network, as well as a set of device profiles for consistent implementation of automation functions across different products. Ethernet/IP uses the transport and control protocols of standard Ethernet, such as TCP/IP and IEEE 802.3, to define the features and functions for its lower layers. Ethernet/IP also uses UDP to transport I/O messages and supports various network topologies, such as star, linear, ring and wireless.
Ethernet/IP is one of the leading industrial protocols in the United States and is widely used in a range of industries, such as factory, hybrid and process. Ethernet/IP is managed by ODVA, Inc., a global trade and standards development organization. References:
* EtherNet/IP - Wikipedia
* EtherNet/IP | ODVA Technologies | Industrial Automation
NEW QUESTION # 31
Which communications system covers a large geographic area?
Available Choices (select all choices that are correct)
- A. Wide Area Network (WAN)
- B. Campus Area Network (CAN)
- C. Local Area Network (LAN)
- D. Storage Area Network
Answer: A
NEW QUESTION # 32
What does the abbreviation CSMS round in ISA 62443-2-1 represent?
Available Choices (select all choices that are correct)
- A. Cyber Security Monitoring System
- B. Control System Management System
- C. Cyber Security Management System
- D. Control System Monitoring System
Answer: C
Explanation:
The abbreviation CSMS stands for Cyber Security Management System in ISA 62443-2-1. This standard defines the elements necessary to establish a CSMS for industrial automation and control systems (IACS) and provides guidance on how to develop those elements123. A CSMS is a collection of policies, procedures, practices, and personnel that are responsible for ensuring the security of IACS throughout their lifecycle24. References: 1: ISA/IEC 62443 Series of Standards - ISA 2: ISA 62443-2-1 - Security for industrial automation and control systems, Part 2-1: Establishing an Industrial Automation and Control Systems Security Program | GlobalSpec 3: IEC 62443-2-1:2010 | IEC Webstore | cyber security, smart city 4: Structuring the ISA/IEC 62443 Standards - ISAGCA
NEW QUESTION # 33
What is the purpose of ISO/IEC 15408 (Common Criteria)?
Available Choices (select all choices that are correct)
- A. To define a product development evaluation methodology
- B. To describe a process for risk management
- C. To describe what constitutes a secure product
- D. To define a security management organization
Answer: A
NEW QUESTION # 34
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, power source, and wireless OD.
- B. LAN, WAN, and hard drive
- C. LAN, portable media, and wireless
- D. LAN, portable media, and hard drives
Answer: C
NEW QUESTION # 35
What is a commonly used protocol for managing secure data transmission over a Virtual Private Network
(VPN)?
Available Choices (select all choices that are correct)
- A. MPLS
- B. SSH
- C. IPSec
- D. HTTPS
Answer: C
NEW QUESTION # 36
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. Transport layer
- C. Data link layer
- D. Session layer
Answer: A
NEW QUESTION # 37
What do packet filter firewalls examine?
Available Choices (select all choices that are correct)
- A. Only the source, destination, and ports in the header of each packet
- B. Every incoming packet up to the application layer
- C. The relationships between packets in a session
- D. The packet structure and sequence
Answer: A
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 # 38
Within the National Institute of Standards and Technoloqv Cybersecuritv Framework v1.0 (NIST CSF), what
is the status of the ISA 62443 standards?
Available Choices (select all choices that are correct)
- A. They are not used.
- B. They are used as informative references.
- C. They are under consideration for future use.
- D. They are used as normative references.
Answer: B
NEW QUESTION # 39
Which of the following is an industry sector-specific standard?
Available Choices (select all choices that are correct)
- A. NIST SP800-82
- B. ISO 27001
- C. ISA-62443 (EC 62443)
- D. API 1164
Answer: D
NEW QUESTION # 40
Which characteristic is MOST closely associated with the deployment of a demilitarized zone (DMZ)?
Available Choices (select all choices that are correct)
- A. Internet access through the firewall is allowed.
- B. Email is prevented, thereby mitigating the risk of phishing attempts.
- C. Level 4 systems must use the DMZ to communicate with Level 3 and below.
- D. Level 0 can only interact with Level 1 through the firewall.
Answer: A
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 # 41
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