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| Section | Objectives |
|---|---|
| Monitoring and Improving the CSMS | - Continuous monitoring of IACS cybersecurity - Incident detection and response - Security lifecycle management |
| How Cyberattacks Happen | - Case studies of industrial cyber incidents - Cyber threats and attack vectors - Vulnerabilities in industrial systems |
| Addressing Risk with Security Policy, Organization, and Awareness | - Security policies and procedures - Security awareness and training - Organizational security roles and responsibilities |
| Validating or Verifying the Security of Systems | - Security validation and verification techniques - Auditing and compliance - Continuous improvement of security measures |
| Addressing Risk with Selected Security Counter Measures | - Virtual Private Networks (VPNs) - Patch management - Firewalls and network security devices - Anti-virus and endpoint protection |
| Addressing Risk with Implementation Measures | - Access control principles - Defense-in-depth strategy - Zones and conduits model - Industrial network architecture and segmentation |
| Creating A Security Program | - Security management organization - Developing a long-term security program - Defining information security policy |
| Understanding the Current Industrial Security Environment | - Convergence of IT and OT - Security challenges in OT environments - Current state of industrial control systems security |
| Risk Analysis | - Cybersecurity risk assessment concepts - Risk and vulnerability analysis techniques - Risk management fundamentals |
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NEW QUESTION # 206
Whose responsibility is it to determine the level of risk an organization is willing to tolerate?
Available Choices (select all choices that are correct)
Answer: A
Explanation:
According to the ISA/IEC 62443 standards, the level of risk an organization is willing to tolerate is determined by the management, as they are responsible for defining the business and risk objectives, as well as the security policies and procedures for the organization. The management also has the authority to allocate the necessary resources and assign the roles and responsibilities for implementing and maintaining the security program. The legal, operations, and safety departments may provide input and feedback to the management, but they do not have the final say in determining the risk tolerance level. References: ISA/IEC 62443-2-1:2010
- Establishing an industrial automation and control systems security program, section 4.2.1.
NEW QUESTION # 207
Which is a commonly used protocol for managing secure data transmission on the Internet?
Available Choices (select all choices that are correct)
Answer: D
NEW QUESTION # 208
What is Modbus?
Answer: B
Explanation:
Modbus is a serial communications protocol originally published by Modicon (now Schneider Electric) in
1979 for use with its programmable logic controllers (PLCs). It has become a de facto standard protocol for communication between industrial electronic devices. Modbus allows devices, such as sensors and instruments, to communicate their data to a controller or computer. The protocol can operate over serial lines (RS-232, RS-485) and has been extended for TCP/IP networks (Modbus TCP). It is not a programming language, network security standard, or a type of industrial machinery. Its simplicity and open nature have made it widespread in industrial environments, but it has minimal built-in security, which is a significant consideration in cybersecurity for industrial control systems.
Reference: ISA/IEC 62443-3-3:2013, Section 4.2.3, and ISA-62443-1-1:2007, Section 3.2.1.
NEW QUESTION # 209
Why is it important to document the results of the initial/high-level risk assessment?
Answer: D
Explanation:
Documenting the results of the initial or high-level risk assessment is crucial to establish a baseline for cybersecurity posture and risk. This baseline serves as a reference for tracking progress, justifying future investments, measuring improvements, and supporting subsequent detailed risk assessments. It also aids in communication with stakeholders and auditors.
Reference: ISA/IEC 62443-2-1:2009, Section 5.2.3 ("Documenting results and baseline"); ISA/IEC 62443-3-
2:2020, Section 4.3.4.
NEW QUESTION # 210
What port number is used by MODBUS TCP/IP for communication?
Answer: C
Explanation:
MODBUS TCP/IP, a widely used communication protocol in industrial control systems, uses TCP port 502 by default.
"Modbus TCP/IP operates on TCP port 502, and this port should be monitored and protected to prevent unauthorized commands to critical control systems."
- ISA/IEC 62443-3-3:2013, Annex A - Communication Protocols
This makes port 502 a high-value target for attackers, which is why it must be secured via firewalls and access control.
References:
ISA/IEC 62443-3-3:2013 - Annex A
MODBUS Application Protocol Specification v1.1b
NEW QUESTION # 211
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