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ISA/IEC 62443 Cybersecurity Fundamentals Specialist Sample Questions (Q214-Q219):

NEW QUESTION # 214
In terms of availability requirements, how do IACS and IT differ?

A. Rebooting is never acceptable in IT but tolerated in IACS.
B. IACS tolerates occasional failures while IT does not.
C. Continuous operation is expected in IT while scheduled operation is sufficient for IACS.
D. Both IACS and IT have the same availability requirements.

Answer: C

Explanation:
The ISA/IEC 62443 standards explain that continuous operation is often required in IT systems (such as data centers and online services), but for IACS environments, scheduled operation (for example, planned maintenance windows) is typically sufficient. IACS systems may accept limited downtime for maintenance, but require high availability during production runs.
Reference: ISA/IEC 62443-1-1:2007, Section 4.4.4 ("Availability in IACS and IT contexts"); Table 7 (Comparison of IT and IACS requirements).

NEW QUESTION # 215
What is the purpose of ISO/IEC 15408 (Common Criteria)?
Available Choices (select all choices that are correct)

A. To describe a process for risk management
B. To define a security management organization
C. To describe what constitutes a secure product
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 # 216
What is the purpose of ICS-CERT Alerts?

A. To advertise cybersecurity services
B. To inform about hardware upgrades
C. To notify the owners of critical infrastructure
D. To alert of targeted global energy sector threats

Answer: C

Explanation:
ICS-CERT (Industrial Control Systems Cyber Emergency Response Team) Alerts are official notifications intended to inform owners and operators of critical infrastructure about vulnerabilities, threats, or incidents relevant to industrial control systems. Their primary purpose is to provide actionable information so that organizations can take necessary steps to protect their IACS environments from evolving cyber risks. While alerts may cover sector-specific threats (including energy), their main audience is critical infrastructure owners and operators.
Reference: ISA/IEC 62443-2-1:2009, Section 6.2.6 ("Incident response and reporting"); CISA ICS-CERT Mission Statement (https://www.cisa.gov/ics).

NEW QUESTION # 217
What is TRUE regarding safety systems?

A. Safety systems are an independent protection layer and as such have no cybersecurity vulnerabilities.
B. Even the most modern and sophisticated safety systems can be defeated by an attacker.
C. By integrating control and safety systems via Modbus TCP, cybersecurity risks are at a tolerable level.
D. No dedicated malware has been found targeting safety systems specifically.

Answer: B

Explanation:
Even the most modern and sophisticated safety systems can be defeated by an attacker. This statement is validated by the discovery of malware specifically targeting safety instrumented systems (SIS), such as the
"Triton/Trisis" malware that compromised the SIS of a petrochemical plant. Safety systems, while designed as independent protection layers, are not immune to cybersecurity vulnerabilities and require specific countermeasures. Integration, such as using Modbus TCP, does not inherently reduce risk to a tolerable level without additional controls.
Reference: ISA/IEC 62443-3-3:2013, Section 4.2.2; ISA/IEC 62443-1-1:2007, Section 3.2.4; ISA/IEC 62443-
2-1:2009, Section 4.2.3.2; TRITON/TRISIS incident case studies.

NEW QUESTION # 218
What are the four main categories for documents in the ISA-62443 (IEC 62443) series?
Available Choices (select all choices that are correct)

A. Assessment. Mitigation. Documentation, and Maintenance
B. General. Policies and Procedures. System, and Component
C. End-User, Integrator, Vendor, and Regulator
D. People. Processes. Technology, and Training

Answer: B

Explanation:
The ISA/IEC 62443 series of standards is organized into four main categories for documents, based on the topics and perspectives that they cover. These categories are: General, Policies and Procedures, System, and Component12.
* General: This category covers topics that are common to the entire series, such as terms, concepts, models, and overview of the standards1. For example, ISA/IEC 62443-1-1 defines the terminology, concepts, and models for industrial automation and control systems (IACS) security3.
* Policies and Procedures: This category focuses on methods and processes associated with IACS security, such as risk assessment, system design, security management, and security program development1. For example, ISA/IEC 62443-2-1 specifies the elements of an IACS security management system, which defines the policies, procedures, and practices to manage the security of IACS4.
* System: This category is about requirements at the system level, such as security levels, security zones, security lifecycle, and technical security requirements1. For example, ISA/IEC 62443-3-3 specifies the system security requirements and security levels for zones and conduits in an IACS5.
* Component: This category provides detailed requirements for IACS products, such as embedded devices, network devices, software applications, and host devices1. For example, ISA/IEC 62443-4-2 specifies the technical security requirements for IACS components, such as identification and authentication, access control, data integrity, and auditability.
The other options are not valid categories for documents in the ISA/IEC 62443 series of standards, as they either do not reflect the structure and scope of the standards, or they mix different aspects of IACS security that are covered by different categories. For example, end-user, integrator, vendor, and regulator are not categories for documents, but rather roles or stakeholders that are involved in IACS security. Assessment, mitigation, documentation, and maintenance are not categories for documents, but rather activities or phases that are part of the IACS security lifecycle. People, processes, technology, and training are not categories for documents, but rather elements or dimensions that are essential for IACS security.
References:
* ISA/IEC 62443 Series of Standards - ISA1
* IEC 62443 - Wikipedia2
* ISA/IEC 62443-1-1: Concepts and models3
* ISA/IEC 62443-2-1: Security management system4
* ISA/IEC 62443-3-3: System security requirements and security levels5
* ISA/IEC 62443-4-2: Technical security requirements for IACS components

NEW QUESTION # 219
......

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