What is CDN?

A Content Delivery Network (CDN) is a distributed network of servers placed in many geographic locations, used to deliver web content to each user from a server near them.

The content is usually static: images, videos, stylesheets, scripts, and other files that look the same for everyone.

The reason a CDN exists is distance. A request travels to a server and the response travels back. If that server is on another continent, the trip takes time no matter how fast the machine is. A CDN keeps a copy of the content close to the user so the trip is short.

**The primary purpose of a CDN is to r