What is CDN? Why is it needed? What gives its use?

What is CDN?

CDN  (Content Delivery Network) — server network, each server is located in different countries. It’s for accelerated delivery or distribution of static content on your site, such as: images, audio, video and other files.

How does work CDN?

You download your content (web-site) in  CDN;

This content transfer between local servers of  the CDN network;

When user will download this content, he will gain it from the nearest server.

How CDN can help speed up the web-site?

CDN servers are located in different countries. They can contain cached data on your web-site, and when the user be closer to it, the web- site loads quicker and faster it gets the files you need.

Result – data is located as closer as it can to the user it will receive them faster.

What can you receive when you use CDN?

•  - Increase the speed of download the web-site with  a large number of users simultaneously;
•  - Reducing the risk of DDoS attacks;
•  - High level stability of the site to bursts of activity;
•  - Reducing the user's consumed traffic;
•  - Reduce the load on web hosting;
•  - Improved search engine ranking.