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What is Content Delivery Network?

A Content Delivery Network (CDN), also known as Content Distribution Network, is a system of the geographically distributed network of proxy servers that deliver cached web content from the closest network location to the user. The primary objective of a CDN is to improve the web performance and ensure the high availability by minimising the time needed to transmit the content from where it is hosted to users. CDNs are used in delivering a wide range of Internet content that includes but is not limited to web objects (text, graphics and scripts), applications (e-commerce, portals), downloadable objects (media files, software, documents), on-demand & live streaming media, and social media sites.

Points to Remember

  • CDNs are an effective way of reducing network latency, occurred due to slow network traffic over large distances. This way CDNs can deliver more versatile content, such as media and Software as a Service to a very large number of users.
  • CDN providers, also called CDN providers host the content either in their own infrastructure or in a  third-party data centre. In return, CDN operators are paid by content owners and media corporations, and other content-based commercial entities.