Final answer:
The Gateway-Cached mode is good for data center extension into AWS as it provides low-latency access to frequently accessed data. Gateway-Stored mode is suitable for applications that require low-latency access to their entire dataset. Gateway-Virtual Tape Library (VTL) mode is used for archiving data to virtual tapes, while Gateway-Virtual Private Cloud (VPC) mode allows deployment directly in a VPC.
Step-by-step explanation:
The storage gateway mode that is good for data center extension into AWS is Gateway-Cached mode. In this mode, frequently accessed data is stored in the local storage of the gateway, while the rest of the data is stored in S3. This mode provides low-latency access to frequently accessed data.
Gateway-Stored mode, on the other hand, stores all the data locally on the gateway and periodically takes snapshots of the data to back it up in S3. This mode is suitable for applications that require low-latency access to their entire dataset.
Gateway-Virtual Tape Library (VTL) mode is used for archiving data to virtual tapes, which are stored in S3. This mode emulates a physical tape library and is typically used by organizations that have existing tape-based backup infrastructure.
Gateway-Virtual Private Cloud (VPC) mode allows the gateway to be deployed directly in a VPC, giving the organization full control over the network configuration and security settings.