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[Hardware] ISA-IEC-62443 New Braindumps - New ISA-IEC-62443 Exam Question

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【Hardware】 ISA-IEC-62443 New Braindumps - New ISA-IEC-62443 Exam Question

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ISA/IEC 62443 Cybersecurity Fundamentals Specialist Sample Questions (Q187-Q192):NEW QUESTION # 187
If an industrial control system experiences frequent unexpected shutdowns causing downtime, which SP Element activities should be reviewed to improve system availability?
  • A. SP Element 2 - Change control
  • B. SP Element 1 - Supply chain security
  • C. SP Element 7 - Logging and event reporting
  • D. SP Element 8 - Backup restoration
Answer: D
Explanation:
System availability is a core objective of ISA/IEC 62443, reflected in the Resource Availability (RA) foundational requirement. When frequent shutdowns occur, the standard directs attention to recovery and resilience mechanisms.
Step 1: Role of SP Element 8
SP Element 8 addresses backup, restore, and recovery capabilities. These activities ensure that systems can be restored quickly and reliably following failures, cyber incidents, or operational errors.
Step 2: Availability focus
Unexpected shutdowns often reveal weaknesses in backup integrity, restoration procedures, or recovery testing. ISA/IEC 62443 requires backups to be verified, protected, and periodically tested to ensure operational continuity.
Step 3: Why other SP Elements are secondary
Supply chain security, change control, and logging are important but do not directly restore operations after shutdowns. Backup and recovery directly impact downtime reduction.
Step 4: Operational outcome
Reviewing SP Element 8 activities helps identify gaps in restoration time objectives, backup completeness, and recovery procedures.
Thus, SP Element 8 - Backup restoration is the most relevant.

NEW QUESTION # 188
Which of the following PRIMARILY determines access privileges for user accounts?
Available Choices (select all choices that are correct)
  • A. Common practice
  • B. Authorization security policy
  • C. Technical capability
  • D. Users' desire for ease of use
Answer: B
Explanation:
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 accesscontrol 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-u ... view=aspnetcore-7.0

NEW QUESTION # 189
What is Modbus?
  • A. A network security standard
  • B. A serial communications protocol
  • C. A programming language
  • D. A type of industrial machinery
Answer: B
Explanation:
Modbus is defined as a serial communication protocol widely used in industrial environments to enable communication among devices such as PLCs, sensors, and actuators.
From ISA/IEC 62443-1-1 (Terminology, Concepts, and Models), Modbus is mentioned in the context of communication protocols:
"Many IACS use legacy communication protocols (e.g., Modbus, DNP3) that were not originally designed with cybersecurity in mind." Modbus was developed in 1979 by Modicon and operates over serial lines (RS-232, RS-485) or over Ethernet as Modbus TCP/IP. It follows a master/slave or client/server architecture.
Incorrect Options:
A). A programming language - Modbus is not a language; it's a protocol.
B). A network security standard - It lacks built-in security; it is a communication protocol, not a security standard.
C). A type of industrial machinery - It facilitates communication between machinery, but is not machinery itself.
References:
ISA/IEC 62443-1-1:2007 - "Terminology, Concepts, and Models"
Official ISA/IEC 62443 Study Guide

NEW QUESTION # 190
How should outreach be handled with product suppliers and service providers?
  • A. Communication should only occur after a system failure.
  • B. Only system integrators need to be informed about lifecycle support.
  • C. Asset owners should be informed about how to report vulnerabilities.
  • D. Patch management policies should be kept confidential from asset owners.
Answer: C
Explanation:
ISA/IEC 62443 places strong emphasis on coordinated communication across the IACS ecosystem, particularly between asset owners, product suppliers, and service providers. Outreach is a core element of vulnerability management and continuous risk reduction.
Step 1: Asset owner accountability
According to ISA/IEC 62443-2-1, the asset owner is responsible for establishing and maintaining processes for identifying, reporting, and responding to cybersecurity vulnerabilities. This includes ensuring that clear reporting channels exist and are communicated to relevant parties.
Step 2: Vulnerability disclosure alignment
ISA/IEC 62443-4-1 requires product suppliers to support vulnerability handling and coordinated disclosure.
For this process to work effectively, asset owners must know how and where to report vulnerabilities discovered during operation.
Step 3: Why proactive communication matters
Waiting until a system failure contradicts the preventive intent of the standard. Cybersecurity is treated as a continuous process, not an incident-driven reaction.
Step 4: Elimination of incorrect options
* Limiting communication to integrators ignores suppliers and operators.
* Keeping patch policies confidential prevents coordinated risk management.
Therefore, the standard supports proactive outreach where asset owners are informed about how to report vulnerabilities, making Option B correct.

NEW QUESTION # 191
Which is the PRIMARY reason why Modbus over Ethernet is easy to manaqe in a firewall?
Available Choices (select all choices that are correct)
  • A. Modbus is a proprietary protocol that is widely supported by vendors.
  • B. Modbus has no known security vulnerabilities, so firewall rules are simple to implement.
  • C. Modbus uses explicit source and destination IP addresses and a sinqle known TCP port.
  • D. Modbus uses a single master to communicate with multiple slaves usinq simple commands.
Answer: C

NEW QUESTION # 192
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