Which service provides hybrid storage integration in which on-premises applications access data over familiar protocols while the actual data is stored in AWS cloud storage?

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Select an answer
CorrectA

Explanation

Question Overview

Selecting a hybrid storage service that connects on-premises and the cloud.

Requirements to satisfy
  • 1「on-premises applications」Access from the existing on-premises environment
  • 2「the actual data is stored in AWS cloud storage」Use the cloud as the backend
  • 3「hybrid storage integration」A bridge between on-premises and the cloud = Storage Gateway
Per-option explanation
ACorrect

AWS Storage Gateway

Correct. AWS Storage Gateway is a hybrid storage service that can be accessed over familiar protocols from on-premises and stores and integrates the data in cloud storage such as S3 behind the scenes. Frequently used data is cached locally while the actual data resides in the cloud.

Difference from DataSync: DataSync is a transfer (sync) tool that moves data from A to B (its purpose is one-time or scheduled copies), whereas Storage Gateway is an always-connected storage layer that on-premises applications keep using day to day.

BIncorrect

AWS DataSync

AWS DataSync is a service for transferring (syncing) data between on-premises and AWS.

Moving data is its purpose, and the requirement for an on-premises application to keep using cloud storage day to day over familiar protocols is met by Storage Gateway, so this is incorrect.

Difference: DataSync is a transfer tool that moves data (one-time or scheduled copies), and Storage Gateway is an always-connected storage layer you keep using.

CIncorrect

AWS Direct Connect

AWS Direct Connect is a network service that connects on-premises and AWS over a dedicated line.

What it provides is a communication path, not a storage bridge (gateway) that exposes cloud storage over protocols such as NFS/SMB, so it is incorrect.

DIncorrect

Amazon EFS

Amazon EFS is primarily a shared file system mounted from EC2 within a VPC.

It is a cloud-side file system and is not a hybrid mechanism like Storage Gateway that places a gateway with a local cache on the on-premises side and integrates over standard protocols, so it is incorrect.

Key Takeaway

'Standard protocols from on-premises', 'actual data in the cloud', and 'hybrid' point to AWS Storage Gateway. A one-time large migration is Snow Family, so distinguish by purpose (ongoing integration vs. one-time transfer).

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