Answer: AWS Storage Gateway volume gateway

## Explanation **AWS Storage Gateway Volume Gateway** is the correct solution because: - **iSCSI Connectivity**: The Volume Gateway provides iSCSI (Internet Small Computer Systems Interface) connectivity, which allows on-premises applications to access cloud storage as if it were local block storage. - **Use Case**: This is specifically designed for scenarios where on-premises applications need to connect to AWS storage using standard iSCSI protocols. **Why other options are incorrect:** - **AWS Storage Gateway File Gateway**: This provides file-based access (NFS/SMB protocols), not iSCSI block storage access. - **Amazon API Gateway**: This is for creating, publishing, and managing APIs, not for storage connectivity. - **AWS Transit Gateway**: This is a network transit hub for connecting VPCs and on-premises networks, not specifically for iSCSI storage connectivity. The Volume Gateway comes in two modes: 1. **Cached volumes** - Store primary data in Amazon S3 and retain frequently accessed data locally 2. **Stored volumes** - Store entire dataset locally and asynchronously back up to AWS Both modes provide iSCSI connectivity for on-premises applications to access AWS storage resources.

Author: Ritesh Yadav