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| Section | Objectives |
|---|---|
| Policies, Procedures, and Governance | - Security policies for industrial control systems - Compliance and governance considerations |
| Introduction to Industrial Cybersecurity | - Fundamentals of cybersecurity in industrial environments - Overview of IT vs OT security concepts |
| Risk and Security Management | - Risk assessment principles - Security lifecycle management in industrial systems |
| ISA/IEC 62443 Framework Overview | - Structure and purpose of IEC 62443 standards - Key terminology and concepts (zones, conduits, security levels) |
| Industrial Network and System Security | - Network segmentation and architecture security - Asset identification and protection |
>> Exam ISA-IEC-62443 Flashcards <<
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NEW QUESTION # 184
Which is the BEST deployment system for malicious code protection?
Available Choices (select all choices that are correct)
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 forindustrial 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 # 185
After receiving an approved patch from the JACS vendor, what is BEST practice for the asset owner to follow?
Answer: D
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 # 186
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?
Answer: B
Explanation:
To demonstrate compliance with ISA/IEC 62443-2-1, the most effective evidence is formal documentation that shows the actual use, configuration, and operation of required cybersecurity policies and controls.
"The asset owner shall document procedures, configuration settings, and evidence of operational security controls to support compliance assessments and audits."
- ISA/IEC 62443-2-1:2010, Clause 4.3.1 - Documented Security Program
Auditors require verifiable, written proof - not informal reports or promotional material.
References:
ISA/IEC 62443-2-1:2010 - Clause 4.3.1
ISA/IEC 62443-2-4 - Supporting audit evidence for service providers
NEW QUESTION # 187
What is Modbus?
Answer: A
Explanation:
Modbus is defined as a serial communication protocol widely used in industrial environments to enable communication among devices such as PLCs, sensors, and actuators.
From ISA/IEC 62443-1-1 (Terminology, Concepts, and Models), Modbus is mentioned in the context of communication protocols:
"Many IACS use legacy communication protocols (e.g., Modbus, DNP3) that were not originally designed with cybersecurity in mind." Modbus was developed in 1979 by Modicon and operates over serial lines (RS-232, RS-485) or over Ethernet as Modbus TCP/IP. It follows a master/slave or client/server architecture.
Incorrect Options:
A). A programming language - Modbus is not a language; it's a protocol.
B). A network security standard - It lacks built-in security; it is a communication protocol, not a security standard.
C). A type of industrial machinery - It facilitates communication between machinery, but is not machinery itself.
References:
ISA/IEC 62443-1-1:2007 - "Terminology, Concepts, and Models"
Official ISA/IEC 62443 Study Guide
NEW QUESTION # 188
Which is a physical layer standard for serial communications between two or more devices?
Available Choices (select all choices that are correct)
Answer: C
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 # 189
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