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| Section | Objectives |
|---|---|
| Topic 1: Policies, Procedures, and Governance | - Compliance and governance considerations - Security policies for industrial control systems |
| Topic 2: Industrial Network and System Security | - Asset identification and protection - Network segmentation and architecture security |
| Topic 3: ISA/IEC 62443 Framework Overview | - Structure and purpose of IEC 62443 standards - Key terminology and concepts (zones, conduits, security levels) |
| Topic 4: Introduction to Industrial Cybersecurity | - Overview of IT vs OT security concepts - Fundamentals of cybersecurity in industrial environments |
| Topic 5: Risk and Security Management | - Security lifecycle management in industrial systems - Risk assessment principles |
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33. Frage
What is recommended to use between the plant floor and the rest of the company networks?
Antwort: B
Begründung:
ISA/IEC 62443 recommends using a firewall to segment and protect the plant floor (Operational Technology or OT network) from the rest of the company's Information Technology (IT) networks. Firewalls enforce security policies by controlling and monitoring traffic, helping to prevent unauthorized access and potential threats from traversing between business and control networks. Hubs and switches do not provide security; routers may offer some basic filtering, but firewalls are explicitly designed for this purpose.
Reference: ISA/IEC 62443-3-3:2013, Section 4.2.3 (Use of network segmentation and firewalls); ISA/IEC
62443-3-2:2020, Section 4.4 (Zones and Conduits).
34. Frage
Which factor drives the selection of countermeasures?
Available Choices (select all choices that are correct)
Antwort: B
35. Frage
Which is a PRIMARY reason why network security is important in IACS environments?
Available Choices (select all choices that are correct)
Antwort: C
Begründung:
Network security is important in IACS environments because PLCs, or programmable logic controllers, are devices that control physical processes and equipment in industrial settings. PLCs under cyber attack can have costly and dangerous impacts, such as disrupting production, damaging equipment, compromising safety, and harming the environment. Therefore, network security is essential to protect PLCs and other IACS components from unauthorized access, modification, or disruption. The other choices are not primary reasons why network security is important in IACS environments. PLCs are not inherently unreliable, but they can be affected by environmental factors, such as temperature, humidity, and electromagnetic interference. PLCs are programmed using ladder logic, which is a graphical programming language that resembles electrical schematics. PLCs use serial or Ethernet communications methods, depending on the type and age of the device, to communicate with other IACS components, such as human-machine interfaces (HMIs), supervisory control and data acquisition (SCADA) systems, and distributed control systems (DCSs). References:
ISA/IEC 62443 Standards to Secure Your Industrial Control System training course1 ISA/IEC 62443 Cybersecurity Fundamentals Specialist Study Guide2 Using the ISA/IEC 62443 Standard to Secure Your Control Systems3
36. Frage
Which of the following are the critical variables related to access control?
Available Choices (select all choices that are correct)
Antwort: A
Begründung:
Access control is the process of granting or denying specific requests to obtain and use information and related information processing services. It is one of the foundational requirements (FRs) of the ISA/IEC
62443 standards for securing industrial automation and control systems (IACSs). According to the ISA/IEC
62443-3-3 standard, access control includes the following system requirements (SRs):
* SR 1.1: Identification and authentication control
* SR 1.2: Use control
* SR 1.3: System integrity
* SR 1.4: Data confidentiality
* SR 1.5: Restricted data flow
* SR 1.6: Timely response to events
* SR 1.7: Resource availability
Among these SRs, the ones that are most related to the critical variables of account management and password strength are SR 1.1 and SR 1.2. SR 1.1 requires that the IACS shall provide the capability to uniquely identify and authenticate all users, processes, and devices that attempt to establish a logical connection to the system. This means that the IACS should have a robust account management system that can create, modify, delete, and monitor user accounts and their privileges. It also means that the IACS should enforce strong password policies that can prevent unauthorized access or compromise of user credentials.
Password strength refers to the level of difficulty for an attacker to guess or crack a password. It depends on factors such as length, complexity, randomness, and uniqueness of the password.
SR 1.2 requires that the IACS shall provide the capability to enforce the use of logical connections in accordance with the security policy of the organization. This means that the IACS should have a mechanism to control the access rights and permissions of users, processes, and devices based on their roles, responsibilities, and needs. It also means that the IACS should have a mechanism to audit and log the activities and events related to access control, such as successful or failed login attempts, password changes, privilege escalations, or unauthorized actions.
Therefore, account management and password strength are the critical variables related to access control, as they directly affect the identification, authentication, and authorization of users, processes, and devices in the IACS.
References:
ISA/IEC 62443-3-3:2013, Security for industrial automation and control systems - Part 3-3: System security requirements and security levels1 ISA/IEC 62443 Cybersecurity Fundamentals Specialist Certificate Program2 ISA/IEC 62443 Cybersecurity Library3 Using the ISA/IEC 62443 Standards to Secure Your Control Systems4
37. Frage
Which of the following staff is NOT mentioned as a stakeholder in the CSMS Program?
Antwort: A
Begründung:
Within the context of the Cyber Security Management System (CSMS) as defined in ISA/IEC 62443-2-1, the primary stakeholders include operations staff (responsible for system operations), IT security staff (for information technology and cybersecurity controls), and physical security staff (for site access and physical barriers). Marketing staff are not typically listed as stakeholders in the design, implementation, or maintenance of the CSMS, since their role does not directly influence the security posture of industrial control systems. This is outlined in the roles and responsibilities sections of the standard.
Reference: ISA/IEC 62443-2-1:2009, Section 4.3.2 ("CSMS Program Stakeholders" and Table 1 - Typical Stakeholders).
38. Frage
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