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What Is CDN and How Does It Work

What is CDN

Every product or service need to have customers. These customers need to be treated as a golden asset via providing them great quality experience of visiting your websites and delivering your content as fastest as it is possible. That is what CDNs do. It delivers you digital content (live video broadcast, video files, file downloads, multimedia content, scripts etc.) to your customers or users significantly faster.

Better experience has positive effect on customer retention and customer lifetime value. You will also recognize that website acceleration will bring new customers and users. Being another step ahead of your competitors will have positive impact on yours growth and sales. CDN service for your websites is a remarkable competitive advantage. It doesn’t only bring better user experience. Faster loading times is crucial when it comes to online marketing and Google and other search engines take site loading time as an important factor. Fast websites rank higher in Google. Then there is also the factor of protection – online content is securely stored on our server network which also protects you against DDOS hacker attacks and site overloads.


How does CDN work

A Content delivery network (CDN) is a large distributed system of servers located in multiple Internet-connected data centers.

To simplify that, Content Delivery Network is nothing more than a system of data centers and servers located throughout the world and an intelligent software that automatically copies your online content and saves it on the servers. When user try to access your content, the software finds the server that would do the best job in delivering your data to the user. That’s usually the closest server to the user.


Impact of site performance on overall site conversion rate

Impact of website performance on conversion rates


Who needs CDN

Any enterprise with a web audience can benefit from using a CDN, but if your users are likely to download lots of stuff from your website, play media files, and/or watch or listen to live broadcasts, you are likely to benefit the most.

The headline content types for CDN services are:

  • Website files and scripts (e.g. HTML, CSS, JavaScript, JSON, XML, Flash, etc.)
  • Live video broadcasts (e.g. sports, concerts, events, etc.)
  • Video files (e.g. movie trailers, ads, promos, instructional material, training, sport highlights, etc.)
  • File downloads (e.g. software downloads, patches, or critical updates)
  • Multimedia content (e.g. games or music)


Type of sites which can benefit on CDN performance:

  • Blogs, corporate sites
  • Retail/E – commerce
  • Game/Gaming Development
  • Software Development
  • News/Social Media/Publishing/Advertising
  • Hobby/Personal/Shared Interest/Travel
  • Entertainment
  • Financial Services


Gaming and game development businesses can benefit from faster initial downloads of game clients, installers, patches, in-game content (a.k.a., downloadable content or DLC), and demos. These files are often large, and can take much longer to receive from the origin server than from a server close to end users. Also, since game content is subject to popular whims, flash crowds can overwhelm origin servers and slow the user experience to a crawl. CDN services protect users from both of these outcomes.

Like gaming and game development businesses, software-related businesses can also benefit from faster file exchange—as can entertainment and media sites that want to deliver a satisfying multimedia experience to their users.

It goes without saying that for general web use there is proven positive correlation between better web performance and improvements in session time, repeat visits, conversions, and abandonment rates. But for some industries and end-user activities, a CDN is a no brainer, even for small enterprises.