ISA Cybersecurity Fundamentals Specialist Exam Prep
Cybersecurity Fundamentals Specialist (Page 5 )

Updated On: 10-Sep-2026

Which is a commonly used protocol for managing secure data transmission on the Internet?

  1. Datagram Transport Layer Security (DTLS)
  2. Microsoft Point-to-Point Encryption (MPPE)
  3. Secure Telnet
  4. Secure Sockets Layer (SSL)

Answer(s): D



Why is OPC Classic considered firewall unfriendly?

  1. It dynamically assigns several ports.
  2. It allows use of only port 80.
  3. It works with control devices from different manufacturers.
  4. It is an obsolete communication standard.

Answer(s): A



Which layer specifies the rules for Modbus Application Protocol (MBAP)?

  1. Data link layer
  2. Session layer
  3. Presentation layer
  4. Application layer

Answer(s): D



Which is a role of the application layer?

  1. Includes protocols specific to network applications such as email, file transfer, and reading data registers in a PLC
  2. Includes user applications specific to network applications such as email, file transfer, and reading data registers in a PLC
  3. Provides the mechanism for opening, closing, and managing a session between end-user application processes
  4. Delivers and formats information, possibly with encryption and security

Answer(s): B



Which factor drives the selection of countermeasures?

  1. Foundational requirements
  2. Output from a risk assessment
  3. Security levels
  4. System design

Answer(s): B



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