Content delivery networks have revolutionised the way large data files are delivered around the world. This has been made possible thanks to their unique architecture.

CDNs work by pulling your website’s data from your origin servers and caching it onto their own global network. These networks typically consist of several different servers located around the world at geographically significant locations where the highest levels of traffic are experienced.

An identical copy of each data is placed on these servers. As end users request your files, they are intelligently rerouted to the CDN servers that are geographically closest to them.
This has three key benefits:

  1. The shorter distance allows data to have a great response and latency time
  2. There is less likelihood of errors occurring over a shorter distance, increasing download speeds and file integrity
  3. By providing multiple download locations, servers are less likely to become overloaded from multiple requests, providing a significant increase in download speeds

By operating in this way, with several redundant copies of data across the world, file security is also increased, as each server contains a live backup of your origin server’s data.