What is a CDN?
How does a CDN work?
CDNs make use of technology like anycast routing, lighttpd web servers and Border Gateway Protocols to deliver the static content from your website’s hosting server to its edge server networks that are spread across the globe. Here’s where all the static content are cached.
When a user visits any website which is actively making use of a CDN, only the dynamic content is loaded from the website’s hosting server and the remaining static assets are loaded from the nearest edge server belonging to the CDN. Once a content is cached in one edge server, it is copied to other edge servers present in the network as well.
The closer the person is to the edge server faster will be the page load time.
Why you need a CDN for your site?
Since the CDN caches all the static content from your site and delivers it from their powerful servers, it definitely helps speed things up. Moreover, it will be serving them from the nearest server present to the visitor rather than loading it from your hosting server thereby reducing bandwidth usage and also helps you cut costs.
Also, Content Delivery Networks help you reduce your dependency on the hosting server’s resources for delivering content to your readers in an instant. Too much server load is not a good sign and CDNs help you ease this load.
Moreover, you will be able to provide your website’s visitors with faster page load times. They will definitely love it and may even feel compelled to go through many of your posts. Trust me, no one likes websites which take more than three seconds to load.
This will definitely help you boost your SEO scores as Google ranks websites higher in the search results page if they load quicker than the competing sites.
Which CDN to choose for your site?
Thus I hope this article helped you in understanding what a CDN is and why you need one for your site. You might also want to have a look at my steps to optimize WordPress to reduce server overload.