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ISA-IEC-62443 Exam Torrent - ISA/IEC 62443 Cybersecurity Fundamentals Specialist Prep Torrent & ISA-IEC-62443 Test Braindumps

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ISA/IEC 62443 Cybersecurity Fundamentals Specialist Sample Questions (Q22-Q27):

NEW QUESTION # 22
Which analysis method is MOST frequently used as an input to a security risk assessment?
Available Choices (select all choices that are correct)

A. Process Hazard Analysis (PHA)
B. System Safety Analysis(SSA)
C. Failure Mode and Effects Analysis
D. Job Safety Analysis(JSA)

Answer: A

NEW QUESTION # 23
What is the name of the missing layer in the Open Systems Interconnection (OSI) model shown below?

A. Protocol
B. User
C. Control
D. Transport

Answer: D

Explanation:
The Open Systems Interconnection (OSI) model is a framework that describes the functions of a networking system. The OSI model categorizes the computing functions of the different network components, outlining the rules and requirement needed to support the interoperability of the software and hardware that make up the network1.
The OSI model consists of seven abstraction layers arranged in a top-down order: Physical, Data Link, Network, Transport, Session, Presentation, and Application. The Transport layer is the fourth layer in the OSI model, and it is responsible for ensuring reliable and efficient data transfer between the Network layer and the Session layer2. The Transport layer uses protocols such as Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) to provide end-to-end communication services, such as error detection and correction, flow control, congestion control, and segmentation2.
The image that you sent shows a 3D representation of the OSI model, with the layers stacked on top of each other. The missing layer is the Transport layer, which is represented by a pink box with a white arrow pointing to it. The arrow is labeled "TCP, UDP".
1: What is the OSI Model? 7 Network Layers Explained | Fortinet 2: What is OSI Model | 7 Layers Explained
- GeeksforGeeks

NEW QUESTION # 24
What does Layer 1 of the ISO/OSI protocol stack provide?
Available Choices (select all choices that are correct)

A. Data encryption, routing, and end-to-end connectivity
B. The electrical and physical specifications of the data connection
C. Framing, converting electrical signals to data, and error checking
D. User applications specific to network applications such as reading data registers in a PLC

Answer: B

NEW QUESTION # 25
Why is OPC Classic considered firewall unfriendly?
Available Choices (select all choices that are correct)

A. OPC Classic is an obsolete communication standard.
B. OPC Classic uses DCOM, which dynamically assigns any port between 1024 and 65535.
C. OPC Classic is allowed to use only port 80.
D. OPC Classic works with control devices from different manufacturers.

Answer: B

Explanation:
OPC Classic uses DCOM, which dynamically assigns any port between 1024 and 65535. Comprehensive Explanation: OPC Classic is a software interface technology that uses the Distributed Component Object Model (DCOM) protocol to facilitate the transfer of data between different industrial control systems. DCOM is a Microsoft technology that allows applications to communicate across a network. However, DCOM is not designed with security in mind, and it poses several challenges for firewall configuration. One of the main challenges is that DCOM does not use fixed TCP port numbers, but rather negotiates new port numbers within the first open connection. This means that intermediary firewalls can only be used with wide-open rules, leaving a large range of ports open for potential attacks. This makes OPC Classic very "firewall unfriendly" and reduces the security and protection they provide. References:
* Tofino Security OPC Foundation White Paper
* Step 2 (for client or server): Configuring firewall settings - GE
* Secure firewall for OPC Classic - Design World

NEW QUESTION # 26
What is the FIRST step required in implementing ISO 27001?
Available Choices (select all choices that are correct)

A. Define an information security policy.
B. Implement strict security controls.
C. Create a security management organization.
D. Perform a security risk assessment.

Answer: C

NEW QUESTION # 27
......

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