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ISA Certification
ISA-IEC-62443 Exam
ISA.ISA-IEC-62443.v2026-10-28.q147 Dumps

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Question 91

How many element qroups are in the "Addressinq Risk" CSMS cateqorv?
Available Choices (select all choices that are correct)

A.5
B.2
C.3
D.4

Correct Answer: C

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Question 92

Which of the following PRIMARILY determines access privileges for user accounts?
Available Choices (select all choices that are correct)

A.Authorization security policy
B.Users' desire for ease of use
C.Technical capability
D.Common practice

Correct Answer: A

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Question 93

In an IACS system, a typical security conduit consists of which of the following assets?
Available Choices (select all choices that are correct)

A.Wiring, routers, switches, and network management devices
B.Power lines, cabinet enclosures, and protective grounds
C.Controllers, sensors, transmitters, and final control elements
D.Ferrous, thickwall, and threaded conduit including raceways

Correct Answer: A

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Question 94

What is the name of the protocol that implements serial Modbus over Ethernet?
Available Choices (select all choices that are correct)

A.MODBUS/CIP
B.MODBUS/Ethernet
C.MODBUS/Plus
D.MODBUS/TCP

Correct Answer: D

MODBUS/TCP is the name of the protocol that implements serial Modbus over Ethernet. MODBUS/TCP is a variant of the Modbus protocol that uses the Transmission Control Protocol (TCP) as the transport layer to encapsulate Modbus messages and send them over Ethernet networks. MODBUS/TCP preserves the Modbus application layer and data model, which means that serial Modbus devices can communicate with MODBUS/TCP devices through a gateway or a converter. MODBUS/TCP is widely used in industrial automation and control systems, as it offers high performance, interoperability, and compatibility with existing Modbus devices. References: ISA/IEC 62443 Cybersecurity Fundamentals Specialist Study Guide, Section
3.1.21; MODBUS Application Protocol Specification V1.1b3, Section 1.1

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Question 95

Which service does an Intrusion Detection System (IDS) provide?
Available Choices (select all choices that are correct)

A.It is the lock on the door for networks and computer systems.
B.It is effective against all vulnerabilities in networks and computer systems.
C.It blocks malicious activity in networks and computer systems.
D.It detects attempts to break into or misuse a computer system.

Correct Answer: D

An intrusion detection system (IDS) is a network security tool that monitors network traffic and devices for known malicious activity, suspicious activity or security policy violations. The IDS sends alerts to IT and security teams when it detects any security risks and threats. However, an IDS does not block or prevent the malicious activity, it only detects and reports it. Therefore, an IDS is not the lock on the door for networks and computer systems, nor is it effective against all vulnerabilities in networks and computer systems. An IDS can be combined with an intrusion prevention system (IPS) to block the malicious activity in real time.
References:
* What is Intrusion Detection Systems (IDS)? How does it Work? | Fortinet1
* Intrusion Detection System (IDS) - GeeksforGeeks2
* What is an intrusion detection system (IDS)? - IBM3

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