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| Section | Weight | Objectives |
|---|---|---|
| Security Fundamentals & ISA/IEC 62443 Framework | 20% | - Zones and conduits model - Structure and parts of ISA/IEC 62443 standards - Core security principles: CIA triad, defense-in-depth - Foundational security requirements |
| Industrial Network Security | 30% | - Network segmentation and security architecture - Industrial protocols security - Threats, vulnerabilities and risk assessment |
| Access Control & Identity Management | 15% | - User authentication and authorization - Security policies and procedures - Role-based access control |
| Industrial Automation and Control Systems (IACS) Overview | 15% | - Differences between IT and OT security - IACS components, architectures and protocols - Cybersecurity importance in industrial environments |
| Security Operations & Incident Response | 20% | - Monitoring, maintenance and continuous improvement - Cybersecurity Management System (CSMS) - Incident handling and response processes |
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NEW QUESTION # 117
Which of the following is a cause for the increase in attacks on IACS?
Available Choices (select all choices that are correct)
Answer: B
NEW QUESTION # 118
Which is a commonly used protocol for managing secure data transmission on the Internet?
Available Choices (select all choices that are correct)
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 # 119
Which is the BEST practice when establishing security zones?
Available Choices (select all choices that are correct)
Answer: D
Explanation:
Security zones are logical groupings of assets that share common security requirements based on factors such as criticality, consequence, vulnerability, and threat. Security zones are used to apply the principle of defense in depth, which means creating multiple layers of protection to prevent or mitigate cyberattacks. By creating security zones, asset owners can isolate the most critical or sensitive assets from the less critical or sensitive ones, and apply different levels of security controls to each zone according to the risk assessment. Security zones are not necessarily aligned with physical network segments, as assets within the same network may have different security requirements. For example, a network segment may contain both a safety instrumented system (SIS) and a human-machine interface (HMI), but the SIS has a higher security requirement than the HMI. Therefore, the SIS and the HMI should be in different security zones, even if they are in the same network segment. Similarly, assets within the same logical communication network may not have the same security requirements, and therefore should not be in the same security zone. For example, a logical communication network may span across multiple physical locations, such as a plant and a corporate office, but the assets in the plant may have higher security requirements than the assets in the office. Therefore, the assets in the plant and the office should be in different security zones, even if they are in the same logical communication network. Finally, all components in a large or complex system should not be in the same security zone, as this would create a single point of failure and expose the entire system to potential cyberattacks. Instead, the components should be divided into smaller and simpler security zones, based on their security requirements, and the communication between the zones should be controlled by conduits.
Conduits are logical or physical connections between security zones that allow data flow and access control.
Conduits should be designed to minimize the attack surface and the potential impact of cyberattacks, by applying security controls such as firewalls, encryption, authentication, and authorization. References:
* How to Define Zones and Conduits1
* Securing industrial networks: What is ISA/IEC 62443?2
* ISA/IEC 62443 Series of Standards3
NEW QUESTION # 120
What is a requirement for product security development lifecycles?
Answer: D
Explanation:
The ISA/IEC 62443-4-1 standard defines the requirements for a secure product development lifecycle for IACS products. One of the core requirements is "risk management" - the systematic process of identifying, evaluating, and mitigating security risks throughout the product lifecycle. This ensures that security is built in from the early design phases through to maintenance and decommissioning. While agile and continuous integration can be useful development methods, they are not specific requirements of the standard. Defense-in- depth is a security principle, not a lifecycle process requirement.
Reference: ISA/IEC 62443-4-1:2018, Section 4.2.3 ("Security risk management").
NEW QUESTION # 121
Which of the following is an example of a device used for intrusion detection?
Answer: A
Explanation:
A Host-based Intrusion Detection System (IDS) is a device or software application used to monitor and analyze the internals of a computing system (host) for malicious activity or policy violations. Unlike routers, switches, or even firewalls, which focus on network traffic or connectivity, a host-based IDS operates on individual machines to detect unauthorized activity or changes.
Reference: ISA/IEC 62443-3-3:2013, Section 4.2.3.6 ("Intrusion detection and prevention"); Glossary:
"Intrusion Detection System (IDS)."
NEW QUESTION # 122
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