A company hosts an application on AWS that gives users the ability to download photos. The company stores all photos in an Amazon S3 bucket that is…

Amazon CloudFront is a global Content Delivery Network (CDN) service designed to deliver content, such as photos, with low latency and high transfer speeds. By creating a CloudFront distribution and setting the Amazon S3 bucket as the origin, content is cached at AWS Edge Locations around the world. When a user requests a photo, the request is routed to the nearest Edge Location, which serves the cached content. This process significantly reduces the distance the data has to travel, thereby minimizing latency for a global user base without needing to replicate the S3 bucket across multiple regions.

A. Routing to S3's public IP addresses is not a supported or reliable practice as they can change. Furthermore, latency-based routing requires resources in multiple regions to be effective; all traffic would still be directed to the single us-east-1 region.

C. Amazon Route 53 geoproximity routing requires resources to be deployed in multiple geographic locations to route users to the nearest one. The scenario describes only a single S3 bucket in one region, making this policy inapplicable.

D. While S3 Cross-Region Replication to one other region would reduce latency for users near that new region, it is not a comprehensive global solution. A CDN like CloudFront is the standard and more effective approach for serving a worldwide audience.

1. Amazon CloudFront Developer Guide: "Amazon CloudFront is a content delivery network (CDN) service... When a user requests content that you're serving with CloudFront

the user is routed to the edge location that provides the lowest latency (time delay)

so that content is delivered with the best possible performance."

Source: AWS Documentation

Amazon CloudFront Developer Guide

"What is Amazon CloudFront?"

Introduction.

2. Amazon CloudFront Developer Guide: "You can use an Amazon S3 bucket as an origin for a CloudFront distribution. To use CloudFront to serve content from an S3 bucket

you create a distribution and specify the bucket as the origin server."

Source: AWS Documentation

Amazon CloudFront Developer Guide

"Using an Amazon S3 bucket as your origin".

3. Amazon Route 53 Developer Guide: "Latency-based routing – Use when you have resources in multiple AWS Regions and you want to route traffic to the region that provides the best latency."

Source: AWS Documentation

Amazon Route 53 Developer Guide

"Choosing a routing policy"

Section: "Latency-based routing".

4. Amazon S3 User Guide: "Cross-Region Replication (CRR) is used to copy objects across Amazon S3 buckets in different AWS Regions... CRR can help you... Minimize latency – If your customers are in two geographic locations

you can maintain copies of objects in AWS Regions that are geographically closer to your users." (Note: This highlights its use for specific locations

not as a global CDN replacement).

Source: AWS Documentation

Amazon S3 User Guide

"Replication"

Section: "Cross-Region Replication (CRR)".