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New ISA-IEC-62443 Exam Papers - Test ISA-IEC-62443 Study Guide

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ISA/IEC 62443 Cybersecurity Fundamentals Specialist Sample Questions (Q45-Q50):

NEW QUESTION # 45
Which characteristic is MOST closely associated with the deployment of a demilitarized zone (DMZ)?
Available Choices (select all choices that are correct)

A. Level 4 systems must use the DMZ to communicate with Level 3 and below.
B. Level 0 can only interact with Level 1 through the firewall.
C. Email is prevented, thereby mitigating the risk of phishing attempts.
D. Internet access through the firewall is allowed.

Answer: D

Explanation:
In cybersecurity, a demilitarized zone (DMZ) refers to a physical or logical subnetwork that contains and exposes an organization's external-facing services to an untrusted network, typically the internet. The main characteristic of a DMZ is that it acts as a buffer zone between the public internet and the private network.
This allows for internet access through the firewall while keeping the internal network secure. Internet-facing servers are placed in the DMZ so that they are separated from the rest of the internal network. By doing so, if a server in the DMZ is compromised, the attacker would not have direct access to the internal network. This architecture is commonly used to host services such as web servers, mail servers, and FTP servers. Choice C is the most closely associated with the deployment of a DMZ as it allows for regulated and monitored internet access through a firewall.

NEW QUESTION # 46
Which is the implementation of PROFIBUS over Ethernet for non-safety-related communications?
Available Choices (select all choices that are correct)

A. PROF1SAFE
B. PROFIBUS PA
C. PROFIBUS DP
D. PROFINET

Answer: D

Explanation:
PROFINET is the implementation of PROFIBUS over Ethernet for non-safety-related communications. It is a standard for industrial Ethernet that enables real-time data exchange between automation devices, controllers, and higher-level systems. PROFINET uses standard Ethernet hardware and software, but adds a thin software layer that allows deterministic and fast communication. PROFINET supports different communication profiles for different applications, such as motion control, process automation, and functional safety. PROFINET is compatible with PROFIBUS, and allows seamless integration of existing PROFIBUS devices and networks123 References: 1: What is PROFINET? - PI North America 2: PROFINET - Wikipedia 3: PROFINET Technology and Application - System Description

NEW QUESTION # 47
Which standard is applied during the Assess phase for risk assessment?

A. ISA/IEC 62443-3-2
B. ISA/IEC 62443-2-1
C. ISA/IEC 62443-3-1
D. ISA/IEC 62443-3-3

Answer: A

Explanation:
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").

NEW QUESTION # 48
Which is a PRIMARY reason why network security is important in IACS environments?
Available Choices (select all choices that are correct)

A. PLCs use serial or Ethernet communications methods.
B. PLCs under cyber attack can have costly and dangerous impacts.
C. PLCs are programmed using ladder logic.
D. PLCs are inherently unreliable.

Answer: B

NEW QUESTION # 49
Which of the following is an industry sector-specific standard?
Available Choices (select all choices that are correct)

A. ISA-62443 (EC 62443)
B. D. ISO 27001
C. API 1164
D. NIST SP800-82

Answer: C

Explanation:
API 1164 is an industry sector-specific standard that provides guidance on the cybersecurity of pipeline supervisory control and data acquisition (SCADA) systems. API stands for American Petroleum Institute, which is the largest U.S. trade association for the oil and natural gas industry. API 1164 was first published in
2004 and revised in 2009 and 2021. The latest version of the standard aligns with the ISA/IEC 62443 series of standards and incorporates the concepts of security levels, zones, and conduits. API 1164 covers the security lifecycle of pipeline SCADA systems, from risk assessment and policy development to implementation and maintenance. The standard also defines roles and responsibilities, security requirements, security controls, and security assessment methods for pipeline SCADA systems.
References:
API 1164: Pipeline SCADA Security, Fourth Edition, September 2021
ISA/IEC 62443 Cybersecurity Fundamentals Specialist Study Guide, Section 2.2.2, Industry Sector-Specific Standards ISA/IEC 62443 Cybersecurity Fundamentals Specialist Exam Specification, Section 2.2.2, Industry Sector- Specific Standards

NEW QUESTION # 50
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