A content delivery network (CDN) is a network of powerful computers located in geographically disparate locations designed to serve web content to visitors with higher performance and efficiency. When a user visits a site using a CDN, the traffic routes through the closest or most efficient server for that user and serves up cached, or stored, versions of the site resources. This allows the site to load faster and eliminate requests back to the origin server. Common resources served by a CDN include static resources like images, HTML, CSS and JavaScript files.

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