PRACTICE ISA-IEC-62443 EXAMS - ISA-IEC-62443 VALID EXAM GUIDE

Practice ISA-IEC-62443 Exams - ISA-IEC-62443 Valid Exam Guide

Practice ISA-IEC-62443 Exams - ISA-IEC-62443 Valid Exam Guide

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Our web-based practice exam software is an online version of the ISA ISA-IEC-62443 practice test. It is also quite useful for instances when you have internet access and spare time for study. To study and pass the ISA ISA-IEC-62443 Exam on the first attempt, our web-based ISA ISA-IEC-62443 practice test software is your best option. You will go through ISA/IEC 62443 Cybersecurity Fundamentals Specialist mock exams and will see for yourself the difference in your preparation.

ISA/IEC 62443 Cybersecurity Fundamentals Specialist Sample Questions (Q54-Q59):

NEW QUESTION # 54
How many security levels are in the ISASecure certification program?
Available Choices (select all choices that are correct)

  • A. 0
  • B. 1
  • C. 2
  • D. 3

Answer: B

Explanation:
The ISASecure certification program, aligned with the ISA/IEC 62443 standards, defines three distinct security levels that categorize the robustness of industrial control systems against known cybersecurity threats.
These levels are designed to provide a scalable approach to securing industrial automation and control systems, with each level offering a higher degree of security. The levels are typically identified as SL1 (Security Level 1), SL2 (Security Level 2), and SL3 (Security Level 3), each addressing increasingly stringent security capabilities and resilience against cyber attacks.


NEW QUESTION # 55
Using the risk matrix below, what is the risk of a medium likelihood event with high consequence?

  • A. Option B
  • B. Option D
  • C. Option C
  • D. Option A

Answer: A

Explanation:
According to the ISA/IEC 62443 Cybersecurity Fundamentals, the risk matrix is a tool used to assess the risk of a particular event. The risk matrix is divided into three categories: likelihood, consequence, and risk. The likelihood is the probability that an event will occur, the consequence is the impact that the event will have, and the risk is the combination of the two. In this case, the risk of a medium likelihood event with high consequence is a high risk, as shown by the red cell in the matrix. References:
* ISA/IEC 62443 Cybersecurity Fundamentals
* [ISA/IEC 62443 Cybersecurity Certificate Program]
* [Cybersecurity Library]
* [Using the ISA/IEC 62443 Standard to Secure Your Control Systems]


NEW QUESTION # 56
What do packet filter firewalls examine?
Available Choices (select all choices that are correct)

  • A. Only the source, destination, and ports in the header of each packet
  • B. Every incoming packet up to the application layer
  • C. The packet structure and sequence
  • D. The relationships between packets in a session

Answer: A

Explanation:
Packet filter firewalls, as defined by ISA/IEC 62443 standards on cybersecurity, primarily examine the source, destination, and ports in the header of each packet. This type of firewall does not inspect the packet content deeply (such as its structure or sequence) or maintain awareness of the relationships between packets in a session. Instead, it operates at a more superficial level, filtering packets based solely on IP addresses and TCP/UDP ports. This approach allows packet filter firewalls to quickly process and either accept or block packets based on these predefined criteria without delving into the complexities of session management or the content of the packets up to the application layer.


NEW QUESTION # 57
After receiving an approved patch from the JACS vendor, what is BEST practice for the asset owner to follow?

  • A. If no problems are experienced with the current IACS, it is not necessary to apply the patch.
  • B. If a high priority, apply the patch at the first unscheduled outage.
  • C. If a medium priority, schedule the installation within three months after receipt.
  • D. If a low priority, there is no need to apply the patch.

Answer: B

Explanation:
According to the ISA/IEC 62443 Cybersecurity Fundamentals Specialist resources, patches are software updates that fix bugs, vulnerabilities, or improve performance of a system. Patches are classified into three categories based on their urgency and impact: low, medium, and high. Low priority patches are those that have minimal or no impact on the system functionality or security, and can be applied at the next scheduled maintenance. Medium priority patches are those that have moderate impact on the system functionality or security, and should be applied within a reasonable time frame, such as three months. High priority patches are those that have significant or critical impact on the system functionality or security, and should be applied as soon as possible, preferably at the first unscheduled outage. Applying patches in a timely manner is a best practice for maintaining the security and reliability of an industrial automation and control system (IACS).
References:
* ISA/IEC 62443 Cybersecurity Fundamentals Specialist Study Guide, Section 4.3.2, Patch Management
* ISA/IEC 62443-2-1:2009, Security for industrial automation and control systems - Part 2-1: Establishing an industrial automation and control systems security program, Clause 5.3.2.2, Patch management
* ISA/IEC 62443-3-3:2013, Security for industrial automation and control systems - Part 3-3: System security requirements and security levels, Clause 4.3.3.6.2, Patch management


NEW QUESTION # 58
Which is the PRIMARY responsibility of the network layer of the Open Systems Interconnection (OSI) model?
Available Choices (select all choices that are correct)

  • A. Gives transparent transfer of data between end users
  • B. Forwards packets, including routing through intermediate routers
  • C. Provides the rules for framing, converting electrical signals to data
  • D. Handles the physics of getting a message from one device to another

Answer: B

Explanation:
The primary responsibility of the network layer of the Open Systems Interconnection (OSI) model is to forward packets, including routing through intermediate routers. The network layer is the third layer from the bottom of the OSI model, and it is responsible for maintaining the quality of the data and passing and transmitting it from its source to its destination. The network layer also assigns logical addresses to devices, such as IP addresses, and uses various routing algorithms to determine the best path for the packets to travel.
The network layer operates on packets, which are units of data that contain the source and destination addresses, as well as the payload. The network layer forwards packets from one node to another, using routers to switch packets between different networks. The network layer also handles host-to-host delivery, which means that it ensures that the packets reach the correct destination host.
The other choices are not correct because:
* B. Gives transparent transfer of data between end users. This is the responsibility of the transport layer, which is the fourth layer from the bottom of the OSI model. The transport layer provides reliable and error-free data transfer between end users, using protocols such as TCP and UDP. The transport layer operates on segments, which are units of data that contain the source and destination port numbers, as well as the payload. The transport layer also handles flow control, congestion control, and multiplexing.
* C. Provides the rules for framing, converting electrical signals to data. This is the responsibility of the data link layer, which is the second layer from the bottom of the OSI model. The data link layer provides the means for transferring data between adjacent nodes on a network, using protocols such as Ethernet and WiFi. The data link layer operates on frames, which are units of data that contain the source and destination MAC addresses, as well as the payload. The data link layer also handles error detection, error correction, and media access control.
* D. Handles the physics of getting a message from one device to another. This is the responsibility of the physical layer, which is the lowest layer of the OSI model. The physical layer provides the means for transmitting bits over a physical medium, such as copper wire, fiber optic cable, or radio waves. The physical layer operates on bits, which are the smallest units of data that can be either 0 or 1. The physical layer also handles modulation, demodulation, encoding, decoding, and synchronization.
References:
* The OSI Model - The 7 Layers of Networking Explained in Plain English1
* Network Layer in OSI Model2
* OSI model3


NEW QUESTION # 59
......

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