AWS Certified Cloud Practitioner

Explanation

AWS Storage Gateway Volume Gateway is the correct solution for connecting on-premises applications to AWS Cloud storage using iSCSI connectivity.

Key Points:

1. iSCSI Protocol Support: AWS Storage Gateway Volume Gateway provides iSCSI connectivity, which allows on-premises applications to access cloud storage as if it were local storage.

2. Use Case: This solution is specifically designed for scenarios where on-premises applications need to use cloud storage as block storage volumes via iSCSI.

3. How It Works:

   • Volume Gateway presents cloud-backed storage volumes to on-premises applications via iSCSI
   • It caches frequently accessed data locally for low-latency access
   • Data is asynchronously backed up to Amazon S3 or Amazon EBS

4. Why Other Options Are Incorrect:

   • AWS Storage Gateway File Gateway: Uses NFS/SMB protocols for file storage, not iSCSI for block storage
   • Amazon API Gateway: A managed API service for creating, publishing, and managing APIs, not for storage connectivity
   • AWS Transit Gateway: A network transit hub for connecting VPCs and on-premises networks, not for iSCSI storage connectivity

5. Benefits:

   • Enables hybrid cloud storage architecture
   • Provides disaster recovery capabilities
   • Offers cost-effective cloud storage integration
   • Maintains compatibility with existing on-premises applications using iSCSI

This solution is ideal for backup and disaster recovery, storage tiering, and extending on-premises storage capacity to the cloud while maintaining iSCSI protocol compatibility.