Which analysis method is MOST frequently used as an input to a security risk assessment? Available Choices (select all choices that are correct)
Correct Answer: C
Question 72
What is OPC? Available Choices (select all choices that are correct)
Correct Answer: B
OPC stands for Open Platform Communications, and it is a series of standards and specifications for industrial telecommunication based on Object Linking and Embedding (OLE) for process control. It allows the communication of real-time data between devices from different manufacturers using various data transportation technologies, such as Microsoft's OLE, COM, DCOM, .NET, XML, and TCP123. OPC is not a protocolitself, but rather a standardized approach for data connectivity supported by the OPC Foundation3. OPC is widely used in industrial automation and control systems, as well as other industries, to achieve interoperability and integration between different applications and devices3. A is incorrect, because OPC is not a field bus protocol, but rather a standard for data exchange between devices that may use different field bus protocols, such as Modbus, Profibus, or Ethernet/IP2. C is incorrect, because OPC is not a serial communications protocol, but rather a standard that can use various data transportation technologies, including serial, Ethernet, or wireless2. D is incorrect, because OPC is not a vendor-specific proprietary protocol, but rather an open standard that can be implemented by any vendor or device that supports the OPC specifications3. References: 1: Open Platform Communications - Wikipedia 2: What is OPC Protocol - The Automization 3: What is OPC? - OPC Foundation
Question 73
Which of the following PRIMARILY determines access privileges for user accounts? Available Choices (select all choices that are correct)
Correct Answer: B
Authorization security policy is the primary factor that determines access privileges for user accounts. Authorization security policy is the function of specifying access rights or privileges to resources, which is related to general information security and computer security, and to access control in particular1. Authorization security policy defines who can access what resources, under what conditions, and for what purposes. Authorization security policy should be aligned with the business objectives and security requirements of the organization, and should be enforced by appropriate mechanisms and controls. Authorization security policy should also be reviewed and updated regularly to reflect changes in the environment, threats, and risks2. Authorization security policy is an essential part of the ISA/IEC 62443 standard, which provides a framework for securing industrial automation and control systems (IACS). The standard defines four security levels (SL) that represent the degree of protection against threats, and specifies the security capabilities that should be implemented for each SL. The standard also provides guidance on how to conduct a security risk assessment, how to define security zones and conduits, and how to apply security policies and procedures to the IACS environment34 . References: https://bing.com/search? q=authorization+security+policy https://learn.microsoft.com/en-us/aspnet/core/security/authorization/policies?view=aspnetcore-7.0
Question 74
What type of security level defines what a component or system is capable of meeting? Available Choices (select all choices that are correct)
Correct Answer: A
According to the IEC 62443 standard, a capability security level (SL-C) is defined as "the security level that a component or system is capable of meeting when it is properly configured and protected by an appropriate set of security countermeasures" 1. A component or system can have different SL-Cs for different security requirements, depending on its design and implementation. The SL-C is determined by testing the component or system against a set of security test cases that correspond to the security requirements. The SL-C is not dependent on the actual operational environment orconfiguration of the component or system, but rather on its inherent capabilities. References: * IEC 62443 - Wikipedia
Question 75
If an asset owner wants to improve their organization's ability to respond during a cyberattack, which of the following activities would be MOST appropriate to implement?
Correct Answer: A
Tabletop exercises simulate cybersecurity incidents in a non-disruptive setting, helping teams test and improve their incident response plans and communication protocols. "Tabletop exercises allow personnel to rehearse roles, responsibilities, and actions in a simulated event scenario. This enhances coordination, preparedness, and decision-making during actual incidents." - ISA/IEC 62443-2-1:2010, Clause 4.3.3.3 - Incident Response Preparedness They are essential for verifying that the incident handling process (SP Element 7) is both understood and effective. References: ISA/IEC 62443-2-1:2010 - Clause 4.3.3.3 NIST SP 800-61 - Computer Security Incident Handling Guide
