The number of websites using CDN service grows every year and this sort of positive trend once again proves that CDN is a very promising and useful technology which helps you improve your website's performance.
So, why should you use CDN network for your website? Frankly speaking CDN networks are the only perfect solution for the website with a lot of traffic and for the projects that care about global availability of their website content. So, the first reason is speed. Yes, it helps you to save priceless seconds that are so rashly wasted while your page is being loaded from the originating server. Secondly, CDN gives you the ability to have a huge network of servers all over the world that deliver your page faster and in a more reliable way according to their geographical proximity to the respective users. And the third reason is the bandwidth - if you own a blog or some popular project that receives tons of traffic, CDN servers will help you stay online and keep your content actually visible to all of your priceless users. But these are just a couple of major advantages that CDN technology gives you, now let's take a closer look at it.
Content delivery network (CDN) is a simple system of computers that stores copies of various content (images, audio and video files) to maximize the odds that the users will freely access the data. The technology that stands behind CDN is placing geographically dispersed "caching servers" for covering maximum of various locations all around the world. The point is that when you host everything only on your own hosting servers (html files, scripts, images) it increases the number of times the files are being addressed on your server, which slows down your website and increases page load time. But by creating a number of sub-domains for images, videos and scripts and placing all these on CDN edge servers you'll receive a very good result due to the parallel download effect.
Types of services
- Streaming - it is not a secret that video streaming requires a lot of bandwidth, and if you are going to deliver a high quality video content CDN will be the best solution for you.
- Downloading - for those websites that offer various types of software and other heavyweight content it would be reasonable to upload the content to CDN servers which will increase files' download speed.
- Acceleration - CDN technology is using a huge number of backbones that naturally accelerate content delivery. The most popular method used by many websites is delivering graphic files via CDN servers and HTML files via the customer's server.
- Server-Side Processing - some large web projects also use CDN servers to deliver their scripts (Java, ASP etc.) which is also a great method to reduce the numbers of times that the customer's server is being addressed and therefore decreases page load time.
- Peer-to-peer Processing - the first P2P project was the famous Napster, and now bitTorrents are using peer-to-peer file sharing protocol. So, as you may have guessed this type of processing requires you to have a software installed on the user's computer (like Torrent clients).
Commercial CDN providers
Free CDN prodivers