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ISA/IEC 62443 Cybersecurity Fundamentals Specialist Sample Questions (Q151-Q156):

NEW QUESTION # 151
Which factor drives the selection of countermeasures?
Available Choices (select all choices that are correct)

A. System design
B. Security levels
C. Output from a risk assessment
D. Foundational requirements

Answer: C

Explanation:
The selection of countermeasures is driven by the output from a risk assessment, which identifies the risks and their associated likelihood and consequences for each zone and conduit in the industrial automation and control system (IACS). The risk assessment also determines the target security level (SL-T) for each zone and conduit, which represents the desired level of protection against the identified threats. The countermeasures are then selected based on the SL-T and the existing security level (SL-A) of the zone and conduit, as well as the cost and feasibility of implementation. The countermeasures should aim to reduce the risk to an acceptable level by increasing the SL-A to meet or exceed the SL-T. References: ISA/IEC 62443-3-2:2018 - Security risk assessment for system design, ISA/IEC 62443-3-3:2013 - System security requirements and security levels, ISA/IEC 62443 Cybersecurity Fundamentals Specialist Training Course

NEW QUESTION # 152
Which of the ISA 62443 standards focuses on the process of developing secure products?
Available Choices (select all choices that are correct)

A. 62443-1-1
B. 62443-3-2
C. 62443-3-3
D. 62443-4-1

Answer: D

Explanation:
The ISA/IEC 62443 series of standards is divided into four main parts, each covering a different aspect of industrial automation and control systems (IACS) cybersecurity1:
* Part 1: Terminology, Concepts, and Models
* Part 2: Policies and Procedures
* Part 3: System Requirements
* Part 4: Component Requirements The part 4 of the series focuses on the requirements for the secure development and maintenance of products that are used in IACS, such as controllers, sensors, actuators, network devices, software applications, and cloud services. The part 4 consists of two standards1:

NEW QUESTION # 153
Which is a commonly used protocol for managing secure data transmission on the Internet?
Available Choices (select all choices that are correct)

A. Secure Telnet
B. Secure Sockets Layer
C. Datagram Transport Layer Security (DTLS)
D. Microsoft Point-to-Point Encryption

Answer: B,C

Explanation:
Datagram Transport Layer Security (DTLS) and Secure Sockets Layer (SSL) are both commonly used protocols for managing secure data transmission on the Internet. DTLS is a variant of SSL that is designed to work over datagram protocols such as UDP, which are used for real-time applications such as voice and video. SSL is a protocol that provides encryption, authentication, and integrity for data transmitted over TCP, which is used for reliable and ordered delivery of data. Both DTLS and SSL use certificates and asymmetric cryptography to establish a secure session between the communicating parties, and then use symmetric cryptography to encrypt the data exchanged. DTLS and SSL are widely used in web browsers, email clients, VPNs, and other applications that require secure communication over the Internet. References:
* ISA/IEC 62443 Standards to Secure Your Industrial Control System, Module 3: Introduction to Cryptography, pages 3-5 to 3-7
* Using the ISA/IEC 62443 Standards to Secure Your Control System, Chapter 6: Securing Communications, pages 125-126

NEW QUESTION # 154
As related to technical security requirements for IACS components, what does CCSC stand for?

A. Comprehensive Component Security Controls
B. Common Component Security Criteria
C. Centralized Component Security Compliance
D. Common Component Security Constraints

Answer: B

Explanation:
CCSC stands for "Common Component Security Criteria." In the ISA/IEC 62443 series, specifically in Part 4-
2, CCSC refers to a harmonized set of security criteria applicable to individual components within an IACS, such as embedded devices, network devices, host devices, and software applications. These criteria are used to ensure that each component meets a consistent baseline for cybersecurity, supporting overall system security.
Reference: ISA/IEC 62443-4-2:2019, Section 4.1 (Definition of CCSC); Glossary.

NEW QUESTION # 155
Which is NOT a potential consequence for organizations that fail to prioritize control system security?

A. Personal injury
B. Unauthorized access, theft, or misuse of data
C. Decreased energy consumption
D. Violation of legal and regulatory requirements

Answer: C

Explanation:
Decreased energy consumption is not a consequence of poor control system security. In fact, security breaches often lead to increased (not decreased) energy consumption due to inefficiencies, system downtime, or damage. Real consequences of failing to prioritize control system security include personal injury (due to process hazards), unauthorized data access, theft or misuse, and violation of regulations (with possible legal penalties).
Reference: ISA/IEC 62443-1-1:2007, Section 4.4; ISA/IEC 62443-2-1:2009, Section 4.2.2 (Potential Consequences Table).

NEW QUESTION # 156
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