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ISACA Certified Information Systems Auditor · Isaca
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The question states it is already maintaining its original functionality, so its D.
When a legacy system is being restructured or modernized while maintaining its original functionality, the most important consideration is whether the system will continue to support the same business capabilities as before. As an IS auditor, understanding what the system does for the business—such as processes supported, transactions handled, and services delivered—is essential to: Ensure that critical functionality is preserved, Verify that the changes align with business needs and continuity, Evaluate the impact of technical changes on business operations. Why not the others? B. Database entity relationships: Relevant at a technical level, but secondary unless they affect business functionality. C. Proposed network topology: Important for infrastructure review, but not as critical as understanding what the system needs to do for the business. D. Data flows between components: Also relevant, but again, only in the context of supporting business functionality.
This answer provided by AI. If you will respond to it by saying "But the question states it is already maintaining its original functionality", it will provide you with option D.