What is a CDN or Content Distribution Network?

Most SEOs may recognize CDN as a network of different servers located around the world that are required to send site information from the nearest server to the user’s geographical location, but this cannot be hidden that CDN or content distribution network using a very powerful firewall is able to detect and destroy attacks on your site in the shortest time, and thus play a very important role in increasing the security and SEO of the site that You have.

Follow us to explain the concept of CDN in a more specialized way

Introducing a CDN or content distribution network

CDN Abbreviated as Content Delivery Network , is a very practical technology that has a great impact on improving the performance and increasing the loading speed of sites. With CDN technology, the speed of sending information to users is increased and the loading time of pages is greatly reduced. The following describes the mechanism of action of CDN, advantages and disadvantages and how to activate it

Explain the mechanism of action of CDN

We said that the CDN service has a great impact on improving the performance and speed of sites. But the question is, by what mechanism and how does the content distribution network cause these results:

The content distribution network (CDN) covers all the servers of the World Wide Web. So when you enable this system for your site, this service is based on downloadable information from your site (such as CSS code files, Java script code files, multimedia files, etc.) or in other words from static web content The site is copied and stored on its various nodes or servers (which are also popular in different parts of the world). Now when a user enters your site from anywhere in the world, he can receive the content of your site including images and texts from the nearest server and does not connect directly to your host or server. This will dramatically increase the loading speed of the site and ultimately improve the SEO of your site.

What is a CDN or Content Distribution Network?

CDN Content Distribution Network

In general, CDNs can be divided into two categories:

Public CDNs: Some CDNs, such as Cloudflare, copy and paste the entire site.

Specialized CDNs: Some other CDNs focus on specific content such as multimedia and fixed files such as JavaScript and CSS.

CDN technology can act as an energy bomb to speed up the site for those sites that have users from different geographical locations. Considering that Iranian sites usually provide their servers and hosts from abroad and countries such as Germany and the United States and most of the visitors are from inside the country, using CDN can be very effective. To determine the effect of CDN on site speed, you can compare your performance with tools such as Pingdom and GTmetrix after and before activation.

Advantages of using a CDN

  • Increase site speed and increase visitor satisfaction
  • Improve SEO status
  • Get better rankings in Google search results
  • Reduce bandwidth consumption and traffic
  • Increase the number of pages reviewed per day by Google robots
What is a CDN or Content Distribution Network?

Disadvantages of using a content delivery network

The use of content delivery network, in addition to its advantages, also has disadvantages. In fact, the content delivery network is not at all cost effective for sites that do not have many visitors. Let’s take a look at the disadvantages of using CDN.

Uneconomical for low traffic sites

Delays in making changes to the site: Sites that use the content delivery network have to make changes to their site by the CDN provider, which is a bit time consuming. Especially for sites that are constantly making changes to their site. Suppose this service is used in the design of a news site. The webmaster may want to put a lot of content on their site at the moment. Of course, this is not possible with the mentioned problem.

How to buy a CDN service

You can provide this service for your website both for free and paid. Currently, no company in Iran offers CDN service and the most famous foreign examples from which  purchase is subject to payment are MaxCDN, VPS.net and Amazon Cloudfront, among which MaxCDN has the best cost terms.

Introducing the companies that offer CDN services for free

There are also Swiss companies that offer free public content distribution network (CDN) services, which we will introduce below

  • Google CDN service
  • Microsoft CDN service
  • JsDelivr CDN service
  • Cdnjs CDN service
  • JQuery CDN service

The last word

Before using any of these services, it is better to do a comprehensive research on them first and pay attention to other customers’ feedback on the performance of these services. This way you can make sure that the service you are using is reliable and does not interfere with the performance of your site.

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