Which Amazon S3 feature or storage class uses the AWS backbone network and edge locations to reduce latencies from the end user to Amazon S3?

Question

Options

• AS3 Cross-Region Replication
• BS3 Transfer Acceleration
• CS3 Event Notifications
• DS3 Standard-Infrequent Access (S3 Standard-IA)

• A
  5% (1)
• B
  95% (20)

Explanation

S3 Transfer Acceleration is correct because it leverages AWS's globally distributed edge locations (part of Amazon CloudFront's network) and the high-speed AWS backbone network to route data transfers between end users and S3 buckets over optimized paths, significantly reducing upload and download latencies regardless of geographic distance.

Why the others are wrong:

• A (Cross-Region Replication): This copies objects between S3 buckets in different AWS regions for redundancy or compliance - it doesn't optimize end-user transfer speeds.
• C (S3 Event Notifications): This triggers actions (e.g., invoking Lambda) when objects are created or deleted - it has nothing to do with network performance.
• D (S3 Standard-IA): This is simply a storage class designed for infrequently accessed data at lower cost - it doesn't involve edge locations or latency optimization.

Memory Tip: Think of "Transfer Acceleration" literally - it accelerates transfers by using edge locations to bring AWS's fast backbone closer to the user, similar to how a highway on-ramp gets you onto a faster road quickly. If a question mentions edge locations + S3 + speed, the answer is always Transfer Acceleration.

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