Which of the following is a component of a cloud vendor assessment program?

• A. Review of audit form attestation reports
• B. Incident response plan for the vendor's internal network
• C. Data encryption standards for customer data
• D. Employee onboarding procedures

Answer: (A)

The main idea being tested is how to obtain objective, independent assurance about a cloud vendor’s control environment. Reviewing audit form attestation reports is the best component because these reports come from independent auditors and provide validated evidence of how well the vendor’s controls operate over security, availability, processing integrity, confidentiality, and privacy. They describe the system, the controls, and the testing performed, and they include the auditor’s opinion on control effectiveness. This lets you assess whether the vendor’s controls are designed properly and functioning over time, identify gaps, and track remediation, which is essential for ongoing risk management and contractual assurance.

Incident response plans for the vendor’s internal network are important for understanding readiness, but they focus on operational protocols rather than independent evidence of control effectiveness. Data encryption standards are critical data-security requirements, yet they are just one aspect of control design and often covered by broader policy; they don’t provide the independent, time-tested assurance that an attestation report does. Employee onboarding procedures relate to internal HR processes and don’t directly show how the vendor’s controls actually perform in practice.

So, review of audit attestation reports stands out as the most reliable, comprehensive source of evidence for assessing a cloud vendor’s controls within a vendor assessment program.