Functional description of security control implementation must include which of the following, primarily as related to technical controls employed in the system? Response:

When describing the functional implementation of a technical security control, it is essential to clearly define what data or conditions the control processes (planned inputs), how it processes them or reacts (expected behavior), and what outcomes or results it generates (expected outputs). This level of detail is crucial for assessment and understanding of the control's effectiveness.

An implementation statement describes how the control is put in place, and a remediation plan addresses identified weaknesses, but these are not primarily about the functional description of how the control operates in real-time.

A remediation plan is for addressing deficiencies, not for describing the function of a control, and while expected outputs are relevant, inputs and behavior are also critical.

An implementation statement describes what was done to set up the control, not its functional operation in terms of inputs, behavior, and outputs.