Amazon CloudFront

Amazon CloudFront is a global content delivery network (CDN) service that accelerates delivery of the websites, APIs, video content or other web assets. It integrates with other Amazon Web Services products to give developers and businesses an easy way to accelerate content to end users with no minimum usage commitments.

Amazon CloudFront is a web service that speeds up distribution of the static and dynamic web content, such as .html, .css, .php, and image files, to the users. CloudFront delivers the content through a worldwide network of data centers called edge locations.

When a user requests content that is been served 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. If the content is already in the edge location with the lowest latency, CloudFront delivers it immediately. If the content is not in that edge location, CloudFront retrieves it from an Amazon S3 bucket or an HTTP server (for example, a web server) as the source for the definitive version of the content.

CloudFront speeds up the distribution of the content by routing each user request to the edge location that can best serve the content. Typically, this is the CloudFront edge location that provides the lowest latency. This dramatically reduces the number of networks that the users' requests must pass through, which improves performance. Users get lower latency—the time it takes to load the first byte of the file—and higher data transfer rates. There is increase in reliability and availability because copies of the files (also known as objects) are now held in multiple edge locations around the world.

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