Certified Information Systems Auditor (CISA) — Question 906

Which of the following is the MOST efficient control that helps to ensure complete data transfer through an interface?

Answer options

• A. Use transmission encryption for data transfer between systems.
• B. Use protocols that allow full duplex communication between source and destination systems.
• C. Compare data hash values between the source and destination systems.
• D. Conduct code reviews of data transfer encoders and decoders in source and destination systems.

Correct answer: C

Explanation

The correct answer is C because comparing hash values ensures that the data received is identical to the data sent, confirming complete transfer. Options A and B address security and communication efficiency but do not directly verify data integrity. Option D focuses on code quality but does not guarantee that the data is transferred without errors.