What is defined as the hardware and software components of an IACS?
Available Choices (select all choices that are correct)

• A.Electronic security
• B.Cybersecuritv
• C.Control system
• D.COTS software and hardware

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Which is a role of the application layer?
Available Choices (select all choices that are correct)

• A.Provides the mechanism for opening, closing, and managing a session between end-user application
  processes
• 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.Includes user applications specific to network applications such as email, file transfer, and reading data
  registers in a PLC

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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.Handles the physics of getting a message from one device to another
• D.Provides the rules for framing, converting electrical signals to data

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

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

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Which of the following is an example of separation of duties as a part of system development and
maintenance?
Available Choices (select all choices that are correct)

• A.Developers write and then test their own code.
• B.Design and implementation are performed by the same team.
• C.Configuration settings are made by one party and self-reviewed using a checklist.
• D.Changes are approved by one party and implemented by another.

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