Answer: AWS Application Discovery Service

## Explanation **AWS Application Discovery Service** is the correct answer because: - **Purpose**: AWS Application Discovery Service helps enterprises plan migration projects by gathering information about their on-premises data centers - **Functionality**: It collects and presents configuration, usage, and behavior data from servers to help understand dependencies - **Non-intrusive**: It doesn't migrate or replicate workloads - it only discovers and analyzes existing infrastructure - **Planning Phase**: Perfect for the initial assessment phase before actual migration begins **Why other options are incorrect**: - **AWS Application Migration Service**: This service actually migrates applications to AWS, which the company specifically wants to avoid at this stage - **Cloud Migration Factory**: This is not an actual AWS service - **AWS Transfer Family**: This service is for secure file transfers into and out of AWS, not for discovery and assessment of on-premises infrastructure The company's requirement to "understand existing on-premises usage and configuration" without replicating workloads aligns perfectly with AWS Application Discovery Service's capabilities for migration planning and assessment.

Author: Ritesh Yadav