NOTE – A new version of the Amazon CloudFront Developer Guide is available at This is official Amazon Web Services (AWS) documentation for the Amazon CloudFront service. This documentation is offered for free here as a Kindle book, or you can read it online or in PDF format at Amazon CloudFront is a web service for delivering content with low latency and high speed. This guide provides a conceptual and architectural overview of Amazon CloudFront. It also explains how to work with objects and distributions, control access to your content, and use the CloudFront REST API.
What is a CDN and how does it work? At its core, a CDN is a network designed to deliver content quickly to users worldwide. When a user requests a website, the CDN routes this request to an edge location closest to them. This edge server caches website content, which reduces the time needed to load the page. Popular CDNs like Amazon CloudFront use multiple edge servers spread globally to minimize latency and improve performance. By answering the question "What is a CDN and how does it work?" we learn that CDNs optimize website speed, reduce bandwidth costs, and enhance security by absorbing traffic spikes and mitigating DDoS attacks. This makes CDNs a key component in modern internet infrastructure.