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| Section | Objectives |
|---|---|
| Addressing Risk with Selected Security Counter Measures | - Firewalls and network security devices - Virtual Private Networks (VPNs) - Patch management - Anti-virus and endpoint protection |
| Understanding the Current Industrial Security Environment | - Convergence of IT and OT - Security challenges in OT environments - Current state of industrial control systems security |
| Validating or Verifying the Security of Systems | - Security validation and verification techniques - Continuous improvement of security measures - Auditing and compliance |
| Monitoring and Improving the CSMS | - Incident detection and response - Security lifecycle management - Continuous monitoring of IACS cybersecurity |
| Addressing Risk with Security Policy, Organization, and Awareness | - Security policies and procedures - Organizational security roles and responsibilities - Security awareness and training |
| Creating A Security Program | - Security management organization - Developing a long-term security program - Defining information security policy |
| Risk Analysis | - Risk and vulnerability analysis techniques - Risk management fundamentals - Cybersecurity risk assessment concepts |
| How Cyberattacks Happen | - Case studies of industrial cyber incidents - Cyber threats and attack vectors - Vulnerabilities in industrial systems |
| Addressing Risk with Implementation Measures | - Defense-in-depth strategy - Industrial network architecture and segmentation - Zones and conduits model - Access control principles |
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質問 # 50
Which is a physical layer standard for serial communications between two or more devices?
Available Choices (select all choices that are correct)
正解：A
解説：
RS232 is a physical layer standard for serial communication between two or more devices. It defines the electrical characteristics, timing, and pinout of connectors for serial data transmission. RS232 is widely used in industrial communication devices, such as PLCs, measuring instruments, and network servers. RS232 allows only one master and one slave to communicate on each line, and operates in a full duplex mode. RS232 haslower transmission speed, shorter maximum cable length, and larger voltage swing than later standards such as RS422 and RS485123 References: 1: Basics of RS232, RS422, and RS485 Serial Communication 2: RS-232 - Wikipedia 3: RS232 Serial Communication Protocol: Basics, Working & Specifications
質問 # 51
Whose responsibility is it to determine the level of risk an organization is willing to tolerate?
Available Choices (select all choices that are correct)
正解：D
質問 # 52
Which of the following are the critical variables related to access control?
Available Choices (select all choices that are correct)
正解：B
質問 # 53
Which standard is applied during the Assess phase for risk assessment?
正解：D
解説：
ISA/IEC 62443-3-2 specifically describes the methodology for conducting risk assessments within industrial automation and control systems (IACS). This part of the standard provides guidance on identifying risks, assigning Security Levels, and making design decisions during the Assess phase of the IACS Cybersecurity Lifecycle.
Reference: ISA/IEC 62443-3-2:2020, Section 4 ("Cybersecurity risk assessment for system design").
質問 # 54
Which of the following is NOT a general class of firewalls?
正解：D
解説：
Packet filter, application proxy, and stateful inspection are all recognized types or classes of firewalls in both IT and industrial control environments. A network monitor, on the other hand, is not considered a firewall but rather a tool for observing and analyzing network traffic. It does not provide firewall-like controls for blocking or allowing traffic.
Reference: ISA/IEC 62443-3-3:2013, Section 4.2.3.3 ("Types of firewalls"); ISA/IEC 62443-1-1:2007, Section 3.2.6.
質問 # 55
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