What is CDN (Content Delivery Network)

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What is a Content Delivery Network (CDN)
A content delivery network or content distribution network (CDN) is a group of servers hosted at different physical locations, working together to distribute or deliver your content (CSS and Javascript files, downloadable objects, applications, real-time media streams, and much more) through multiple servers instead of a single server you are hosting in. With content delivery network (CDN) technology, a client or website visitors accesses a copy of data from the server closest to them instead of accessing to single central server.

A content delivery network (CDN) help to avoid bottleneck near that server. It improved the response time; therefore making a website load faster.

CDN Technology first emerged a decade ago, largely in response to the large-scale content needs of major internet enterprises, but as the web has grown, the demand for CDN Solutions has also spread. Currently, CDNs represent one of the fastest-growing and most exciting technology markets among internet technologies.

Who Needs CDN
Exabytes’s Content Delivery Network (CDN) is a very efficient and affordable solution for businesses of all sizes. CDN helps you to immediately boost up your website performance and improve your website loading speed.

Content Delivery Network (CDN) is suitable for
* Websites with a lot of images, videos and files..
* Portals.
* Blogs.
* Forums.
* Web Applications.
* Photo Galleries.
* E-Learning Sites.
* E-Commerce Stores.
* Online Product Catalogs.
* iPhone Apps.
* and many more.

In short, Content Delivery Network (CDN) is suitable for most of the websites with small to medium and large traffic.

How CDN Helps Your Site Loads Faster

The capacity sum of strategically placed CDN edge servers can be higher than the network backbone capacity. This can result in an impressive increase in the number of concurrent users. For instance, when there is a 10 Gbit/s network backbone and 100 Gbit/s central server capacity, only 10 Gbit/s can be delivered. But when 10 servers are moved to 10 CDN edge locations, total capacity can be 10×10 Gbit/s. Strategically placed CDN edge servers decrease the load on interconnects, public peers, private peers and backbones, freeing up capacity and lowering delivery costs. It uses the same principle as above. Instead of loading all traffic on a backbone or peer link, a CDN can offload these by redirecting traffic to edge servers.

Website without Content Delivery Network (CDN)



* For a conventional website which is without CDN, all the contents, images, files, videos are served from a single server from a single location.
* When there is a sudden surge of traffic, the standalone server may be congested.
* When the single server is down, all the contents become inaccessible.

Website powered by Content Delivery Network (CDN)



* For a website powered by CDN, the static content, images, videos and files are copied and cached at the CDN EDGE servers around the world.
* When the static content is called, it will be served from the nearest CDN server.
* Website powered by CDN can load faster and can handle larger amounts of traffic, including sudden surge of traffic.