Published June 26th in SEO by James Parsons

Content delivery networks, or CDNs, are very useful tools. They can be quite beneficial to SEO, though it’s also possible that they can hurt you if you use them improperly. Which are the best ones to use?
What Are CDNs, and How Do They Work?
Before you can find out which CDNs are the best, you need to know just how they work. Otherwise, when it comes to evaluating your needs and the features on offer from the CDNs out there, you won’t know your head from your tail.
A CDN is basically a local server that caches your files for you, and loads them to users upon request. If that sounds like what your web host is doing, it’s similar, but CDNs leverage a globalized level of presence to get files to you much faster. They also need a web host server as a basis for your content.

The typical site load is a user requesting to load a page on your site. Their browser sends a request to your web host server, which figures out what files need to be loaded and sends them back. The user sees them load.
The path between the user’s location and the web server can be quite long, however. It might have to hop out to a local router, then out to an ISP router, then out to a network hub, then over to another hub, a…

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