[Q44-Q68] 2025 Updated ISA-IEC-62443 Tests Engine pdf – All Free Dumps Guaranteed!

QUESTION 44
Which is the implementation of PROFIBUS over Ethernet for non-safety-related communications?
Available Choices (select all choices that are correct)

PROFIBUS DP

PROFIBUS PA

PROFINET

PROF1SAFE

QUESTION 45
Authorization (user accounts) must be granted based on which of the following?
Available Choices (select all choices that are correct)

Individual preferences

Common needs for large groups

Specific roles

System complexity

QUESTION 46
Which of the following can be employed as a barrier device in a segmented network?
Available Choices (select all choices that are correct)

Router

Unmanaged switch

VPN

Domain controller

QUESTION 47
Which communications system covers a large geographic area?
Available Choices (select all choices that are correct)

Campus Area Network (CAN)

Local Area Network (LAN)

Storage Area Network

Wide Area Network (WAN)

QUESTION 48
What do packet filter firewalls examine?
Available Choices (select all choices that are correct)

The packet structure and sequence

The relationships between packets in a session

Every incoming packet up to the application layer

Only the source, destination, and ports in the header of each packet

QUESTION 49
Which of the following attacks relies on a human weakness to succeed?
Available Choices (select all choices that are correct)

Denial-of-service

Phishing

Escalation-of-privileges

Spoofing

QUESTION 50
Which type of cryptographic algorithms requires more than one key?
Available Choices (select all choices that are correct)

Block ciphers

Stream ciphers

Symmetric (private) key

Asymmetric (public) key

QUESTION 51
Which analysis method is MOST frequently used as an input to a security risk assessment?
Available Choices (select all choices that are correct)

Failure Mode and Effects Analysis

Job Safety Analysis(JSA)

Process Hazard Analysis (PHA)

System Safety Analysis(SSA)

QUESTION 52
Which of the following is an element of monitoring and improving a CSMS?
Available Choices (select all choices that are correct)

Increase in staff training and security awareness

Restricted access to the industrial control system to an as-needed basis

Significant changes in identified risk round in periodic reassessments

Review of system logs and other key data files

QUESTION 53
In a defense-in-depth strategy, what is the purpose of role-based access control?
Available Choices (select all choices that are correct)

Ensures that users can access systems from remote locations

Ensures that users can access only certain devices on the network

Ensures that users can access only the functions they need for their job

Ensures that users correctly manage their username and password

QUESTION 54
Which of the following is a recommended default rule for IACS firewalls?
Available Choices (select all choices that are correct)

Allow all traffic by default.

Allow IACS devices to access the Internet.

Allow traffic directly from the IACS network to the enterprise network.

Block all traffic by default.

QUESTION 55
In an IACS system, a typical security conduit consists of which of the following assets?
Available Choices (select all choices that are correct)

Controllers, sensors, transmitters, and final control elements

Wiring, routers, switches, and network management devices

Ferrous, thickwall, and threaded conduit including raceways

Power lines, cabinet enclosures, and protective grounds

QUESTION 56
What are three possible entry points (pathways) that could be used for launching a cyber attack?
Available Choices (select all choices that are correct)

LAN, portable media, and wireless

LAN, portable media, and hard drives

LAN, power source, and wireless OD.

LAN, WAN, and hard drive

QUESTION 57
What are the three main components of the ISASecure Integrated Threat Analysis (ITA) Program?
Available Choices (select all choices that are correct)

Software development security assurance, functional security assessment, and communications
robustness testing

Software robustness security testing, functional software assessment assurance, and essential security
functionality assessment

Communications robustness testing, functional security assurance, and software robustness
communications

Communication speed, disaster recovery, and essential security functionality assessment

QUESTION 58
What does the abbreviation CSMS round in ISA 62443-2-1 represent?
Available Choices (select all choices that are correct)

Control System Management System

Control System Monitoring System

Cyber Security Management System

Cyber Security Monitoring System

QUESTION 59
Which layer specifies the rules for Modbus Application Protocol
Available Choices (select all choices that are correct)

Data link layer

Session layer

Presentation layer

Application layer

QUESTION 60
What are the two sublayers of Layer 2?
Available Choices (select all choices that are correct)

HIDS and NIDS

LLC and MAC

OPC and DCOM

VLAN and VPN

QUESTION 61
Which is the PRIMARY reason why Modbus over Ethernet is easy to manaqe in a firewall?
Available Choices (select all choices that are correct)

Modbus uses a single master to communicate with multiple slaves usinq simple commands.

Modbus is a proprietary protocol that is widely supported by vendors.

Modbus uses explicit source and destination IP addresses and a sinqle known TCP port.

Modbus has no known security vulnerabilities, so firewall rules are simple to implement.

QUESTION 62
Which is the BEST deployment system for malicious code protection?
Available Choices (select all choices that are correct)

Network segmentation

IACS protocol converters

Application whitelistinq (AWL) OD.

Zones and conduits

QUESTION 63
Which is the PRIMARY reason why Modbus over Ethernet is easy to manaqe in a firewall?
Available Choices (select all choices that are correct)

Modbus uses a single master to communicate with multiple slaves usinq simple commands.

Modbus is a proprietary protocol that is widely supported by vendors.

Modbus uses explicit source and destination IP addresses and a sinqle known TCP port.

Modbus has no known security vulnerabilities, so firewall rules are simple to implement.

QUESTION 64
Using the risk matrix below, what is the risk of a medium likelihood event with high consequence?

Option A

Option B

Option C

Option D

QUESTION 65
Which is a role of the application layer?
Available Choices (select all choices that are correct)

Includes protocols specific to network applications such as email, file transfer, and reading data registers
in a PLC

Includes user applications specific to network applications such as email, file transfer, and reading data
registers in a PLC

Provides the mechanism for opening, closing, and managing a session between end-user application
processes

Delivers and formats information, possibly with encryption and security

QUESTION 66
Which is a reason for
and physical security regulations meeting a mixed resistance?
Available Choices (select all choices that are correct)

Regulations are voluntary documents.

Regulations contain only informative elements.

Cybersecurity risks can best be managed individually and in isolation.

There are a limited number of enforced cybersecurity and physical security regulations.

QUESTION 67
Which is the BEST practice when establishing security zones?
Available Choices (select all choices that are correct)

Security zones should contain assets that share common security requirements.

Security zones should align with physical network segments.

Assets within the same logical communication network should be in the same security zone.

All components in a large or complex system should be in the same security zone.

Security zones are logical groupings of assets that share common security requirements based on factors such as criticality, consequence, vulnerability, and threat. Security zones are used to apply the principle of defense in depth, which means creating multiple layers of protection to prevent or mitigate cyberattacks. By creating security zones, asset owners can isolate the most critical or sensitive assets from the less critical or sensitive ones, and apply different levels of security controls to each zone according to the risk assessment. Security zones are not necessarily aligned with physical network segments, as assets within the same network may have different security requirements. For example, a network segment may contain both a safety instrumented system (SIS) and a human-machine interface (HMI), but the SIS has a higher security requirement than the HMI. Therefore, the SIS and the HMI should be in different security zones, even if they are in the same network segment. Similarly, assets within the same logical communication network may not have the same security requirements, and therefore should not be in the same security zone. For example, a logical communication network may span across multiple physical locations, such as a plant and a corporate office, but the assets in the plant may have higher security requirements than the assets in the office. Therefore, the assets in the plant and the office should be in different security zones, even if they are in the same logical communication network. Finally, all components in a large or complex system should not be in the same security zone, as this would create a single point of failure and expose the entire system to potential cyberattacks. Instead, the components should be divided into smaller and simpler security zones, based on their security requirements, and the communication between the zones should be controlled by conduits.
Conduits are logical or physical connections between security zones that allow data flow and access control.
Conduits should be designed to minimize the attack surface and the potential impact of cyberattacks, by applying security controls such as firewalls, encryption, authentication, and authorization. References:
* How to Define Zones and Conduits1
* Securing industrial networks: What is ISA/IEC 62443?2
* ISA/IEC 62443 Series of Standards3

QUESTION 68
Which is an important difference between IT systems and IACS?
Available Choices (select all choices that are correct)

Routers are not used in IACS networks.

The IACS security priority is integrity.

The IT security priority is availability.

IACS cybersecurity must address safety issues.