There are many of you who must have heard about CDN or better known as Content Delivery Network, and if not, then this article will surely help you in understanding it in a better way. CDN is an integral part of the internet in charge of content delivery. Every one of us interacts with CDN on a daily basis in various forms such as visiting a website, using social media platforms, window shopping, watching online videos, and many others.
Everything that you do on the internet, CDNs will be present behind every character of the text, images, and movie frames that are seen through your PC or smartphone. In a clear sense, every website available on the internet is hosted on a particular server located at a particular geographical location. So, when a user requests a page to that server, they have only one space available to pull the resources.
1. How a CDN works
Basically, the loading speed of a web page depends very much on the actual distance between the originating server and the site viewer. Along with that, the page speed can be affected if the website is rich in content such as high-quality images, videos, and many others. So, what CDN basically does is that it allows the relevant files of a particular website cached and stored on multiple local servers situated at different geographical data centers across the globe.
These data centers are also known as Points of Presence (PoPs) are optimized to communicate with the site viewer closet to them, so, when a user request for a page, their request will be not be sent directly to the main server, but rather than to these CDN PoPs. Well, this improves the loading speed of the page exponentially.
2. What are the benefits of CDN?
There are plenty of benefits of using CDN. It acts as a secondary server nearest to the geographical location of the user requesting to the webpage. Below are some of the main benefits of CDN:
3. Improvement in the speed of the site
The users’ requests are sent to the nearest CDN PoPs rather than directly to the origin server. Ultimately, this helps a lot in improving the speed of the website.
4. Lowers the chances of a crash
Sending too many requests directly to the main server may lead to crash issues that will make the page difficult to respond. This is where CDN can prove to be extremely useful because all the requests are directed to different servers located at different geographical locations.
5. Provide better security
As the amount of data transfer on the internet is increasing, the threats of cyber-attacks are also increasing day by day. Cybercriminals are continuously looking for a loophole so that they can breach the security.