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ISA/IEC 62443 Cybersecurity Fundamentals Specialist Sample Questions:

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

A) Modbus has no known security vulnerabilities, so firewall rules are simple to implement.
B) Modbus uses a single master to communicate with multiple slaves usinq simple commands.
C) Modbus is a proprietary protocol that is widely supported by vendors.
D) Modbus uses explicit source and destination IP addresses and a sinqle known TCP port.

2. Which of the following ISA-99 (IEC 62443) Reference Model levels is named correctly?

A) Level 2: Quality Control
B) Level 3: Operations Management
C) Level 4: Process
D) Level 1: Supervisory Control

3. Which ISA/IEC 62443 part covers technical security requirements used by product suppliers, integration service providers, and asset owners?

A) ISA/IEC 62443-3-3
B) ISA/IEC 62443-2-4
C) ISA/IEC 62443-4-2
D) ISA/IEC 62443-2-1

4. What is a requirement for product security development lifecycles?

A) Agile development
B) Defense-in-depth strategy
C) Risk management
D) Continuous integration

5. What is the name of the missing layer in the Open Systems Interconnection (OSI) model shown below?

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

Solutions: