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| Section | Objectives |
|---|---|
| Risk and Security Management | - Security lifecycle management in industrial systems - Risk assessment principles |
| 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 | - Asset identification and protection - Network segmentation and architecture security |
| 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 |
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NEW QUESTION # 117
Which of the following provides the overall conceptual basis in the design of an appropriate security program?
Available Choices (select all choices that are correct)
Answer: B
NEW QUESTION # 118
In an IACS system, a typical security conduit consists of which of the following assets?
Available Choices (select all choices that are correct)
Answer: B
Explanation:
A security conduit is a logical or physical grouping of communication channels connecting two or more zones that share common security requirements1. A zone is a grouping of systems and components based on their functional, logical, and physical relationship that share common security requirements1. Therefore, a security conduit consists of assets that enable or facilitatecommunication between zones, such as wiring, routers, switches, and network management devices. Controllers, sensors, transmitters, and final control elements are examples of assets that belong to a zone, not a conduit. Ferrous, thickwall, and threaded conduit including raceways are physical structures that may enclose or protect wiring, but they are not part of the communication channels themselves. Power lines, cabinet enclosures, and protective grounds are also not part of the communication channels, but rather provide power or protection to the assets in a zone or a conduit. References: 1: Key Concepts of ISA/IEC 62443: Zones & Security Levels | Dragos
NEW QUESTION # 119
What is a feature of an asymmetric key?
Available Choices (select all choices that are correct)
Answer: C
Explanation:
An asymmetric key is a feature of asymmetric cryptography, also known as public-key cryptography, which is a method of encrypting and decrypting data using two different keys: a public key and a private key. The public key can be shared with anyone, while the private key must be kept secret by the owner. The public key and the private key are mathematically related, but it is computationally infeasible to derive one from the other. Asymmetric cryptography can be used for various purposes, such as digital signatures, key exchange, and encryption. For example, if Alice wants to send a message to Bob, she can use Bob's public key to encrypt the message, and only Bob can decrypt it using his private key. Alternatively, if Bob wants to prove that he is the author of a message, he can use his private key to sign the message, and anyone can verify it using his public key. Asymmetric cryptography has some advantages over symmetric cryptography, which uses the same key for both encryption and decryption. For instance, asymmetric cryptography does not require a secure channel to distribute the keys, and it can provide non-repudiation and authentication.
However, asymmetric cryptography also has some drawbacks, such as higher computational complexity, larger key sizes, and higher network overhead.
References:
ISA/IEC 62443-3-3:2018, Section 4.2.3.6.1, Cryptography1
ISA/IEC 62443-4-2:2019, Section 4.2.3.6.1, Cryptography
ISA/IEC 62443 Cybersecurity Fundamentals Specialist Study Guide, Section 5.3.1, Cryptography ISA/IEC 62443 Cybersecurity Fundamentals Specialist Exam Specification, Section 5.3.1, Cryptography
NEW QUESTION # 120
In terms of availability requirements, how do IACS and IT differ?
Answer: D
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 # 121
Which analysis method is MOST frequently used as an input to a security risk assessment?
Available Choices (select all choices that are correct)
Answer: D
Explanation:
A Process Hazard Analysis (PHA) is a systematic method of identifying and evaluating the potential hazards associated with an industrial process. A PHA can help to identify the sources of cyber threats, the consequences of cyber incidents, and the existing safeguards and mitigation measures. A PHA is most frequently used as an input to a security risk assessment because it provides a comprehensive and structured overview of the process and its risks, which can then be used to determine the security level targets and security countermeasures for the industrial automation and control system (IACS). A PHA can also help to align the security objectives with the safety objectives of the process, and to ensure that the security measures do not compromise the safety or operability of the process. References:
* ISA/IEC 62443 Standards to Secure Your Industrial Control System, page 10
* Using the ISA/IEC 62443 Standard to Secure Your Control System, page 17
NEW QUESTION # 122
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