Isaiec 62443 Cybersecurity Fundamentals Specialist · Free Practice Question Easy
Question 18
Which is a role of the application layer in IACS?
- A Includes user applications specific to network applications such as email, file transfer, and reading data registers in a PLC
- B Delivers and formats information, possibly with encryption and security
- C Includes protocols specific to network applications such as email, file transfer, and reading data registers in a PLC
- D Provides the mechanism for opening, closing, and managing a session between end-user application processes
Reveal correct answer
Correct answer: C
Explanation
The role of the application layer in the OSI model includes several protocols that facilitate network operations such as email, file transfer, and data registry access in Programmable Logic Controllers (PLCs). Rest of the options are incorrect as the application layer is not concerned with closing session, delivery of information and user applications specific reading data registers.
Discussion
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