What is CDN ? How does a CDN Works ?
The CDN will deliver the content of these files from a server that’s nearest to your visitor’s location, this will speed up page load. You will have to sign up for a CDN service, such as MaxCDN (recommended by W3 Total Cache plugin). That’s all for the general settings.
How does a CDN Works?
To minimize the distance between the visitors and your website’s server, a CDN stores a cached version of its content in multiple geographical locations (a.k.a., points of presence, or PoPs). Each PoP contains a number of caching servers responsible for content delivery to visitors within its proximity.
In essence, CDN puts your content in many places at once, providing superior coverage to your users. For example, when someone in London accesses your US-hosted website, it is done through a local UK PoP. This is much quicker than having the visitor’s requests, and your responses, travel the full width of the Atlantic and back.
This is how a CDN works in a nutshell. Of course, as we thought we needed an entire guide to explain the inner workings of content delivery networks, the rabbit hole goes deeper.