CDN – What is it and how does it work?

CDN – definition

The term CDN refers to a “content delivery network.” It’s a network of servers that spans a large geographic area and has extremely particular server locations. The purpose is to cover the territory from which possible tourists may originate thoroughly. To have servers that cache data (code, photos, movies, and so on) as close to visitors as possible. Visitors will receive better and faster service as a result of this. The CDN’s other benefit is load balancing, which reduces the workload on the central server.

How does it work?

CDN works in a simple way. It saves a cached version of the demand information in multiple points of presence (PoPs). Every PoP also has a caching server in charge of providing content to users in its immediate area. For example, users in France will access your site through a local France PoP if you own an e-shop in the United Kingdom. Their queries and your site’s responses will not have to go across continents.

Every CDN has servers located at Internet exchange points (IXPs). For its part, Internet service providers connect to these key locations, for example, to provide access to the traffic generated on their various networks. Connection to these IXPs gives CDNs significantly increased speed and connectivity to a wide range of destinations. This saves costs and transit times in high-speed data delivery for content delivery network providers.

Who is the CDN for?

It is for everyone! Yes, almost everyone can implement and create CDN. Take a media corporation, for example. If you already have one, a content delivery network could be the key to expanding your distribution. It might also be helpful for e-commerce sites, especially if they operate in a number of markets, such as the United States. Alternatively, if different countries, such as the European Union, are your target market, it may be a good match. Blog sites, news sites, online services, and many other types of websites are not exempt. It is entirely dependent on your requirements.


  • A CDN shortens the time it takes for a website to load and minimizes latency to the absolute minimum. This is because you have a cached version of the requested content on a server near to where the origin of the request. This makes the transmission of the necessary materials to load it much faster (images, videos, javascript files, HTML pages, etc.).
  • CDN increases the availability and redundancy of your data. Each of the servers in a content delivery network can save a cached copy of your information. Of course, things happen, and hardware can fail, but this redundancy can ensure that your website’s information is always available.
  • Content delivery networks can help to improve security. They can efficiently distribute traffic since they are huge networks. DDoS protection, security certificates, and other features are also available from reputable vendors.

Recommended article: GeoDNS – The Best Solution For Global Organizations


One of the most important criteria in determining the efficiency of a website is its speed. With CDN, you may get better performance and a better user experience. Use it, and you’ll see the benefits right away in your wallet!

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