No matter what you do, or what type of content you consume, you will most likely find content delivery networks behind every text character, every pixel image and every movie frame that is delivered to your PC and mobile browser.
To understand why CDNs are so widely used, you must first recognize the problem that it is designed to solve. Known as latency, it is the annoying delay that occurs from the moment you request to load a web page until the moment when your content actually appears on the screen.
This delay interval is affected by a number of factors, many of them specific to a given web page. In all cases, however, the duration of the delay is affected by the physical distance between you and the hosting server of that website. The mission of a CDN is to virtually reduce that physical distance, in order to improve the speed and performance of the site representation.
What is Content Delivery Network
Content Delivery Network is an architecture model of geographically distributed servers connected to the same network, where replicas of a site’s content are stored. This allows users of the website to access the copy on the server geographically closest, reducing the data transfer time (latency).
CDN also communicates with the source server to deliver any content that has not been previously cached. In addition, its use allows the site to avoid DDoS attacks and maintain high availability, being present simultaneously in different datacenters.
Also, content delivery networks (CDN) are the transparent backbone of the Internet responsible for the delivery of content. Regardless of whether we know it or not, each one of us interacts with the CDNs on a daily basis; when you read articles on news sites, buy online, watch YouTube videos or watch social media sources.
The Evolution of CDN
Commercial CDNs have existed since the 1990s. Like any other technology decades old, they went through several evolutionary stages before becoming the robust application platform they are today.
The trajectory of CDN development was shaped by market forces, including new trends in content consumption and extensive increases in connectivity. The latter has been enabled by an optical fiber and other new communication technologies.
In general, the evolution of CDN can be segmented into three generations, each introducing new capabilities, technologies, and concepts in its network architecture. Working in parallel, each generation saw the price of CDN services down, marking its transformation into a mass market technology.
How Does CDN Work?
To minimize the distance between visitors and the server of your website, a CDN stores a cached version of its content in several geographic locations (aka, points of presence or PoP). Each PoP contains a series of cache servers responsible for delivering content to visitors within its proximity.
In essence, CDN puts its content in many places at once, providing superior coverage to its users. For example, when someone in London accesses their website hosted in the United States, it is done through a local PoP in the United Kingdom. This is works swifter when compared to having the visitor’s requests and their responses travel the entire width of the Atlantic and return.
The Best CDN Service Provider?
In the world today, there are several operators offering Content Delivery Network (CDN) services. One among the biggest and most famous is the CDN Cloudflare which is also very reliable. The prices between the various operators can also differ greatly, and consequently create much confusion even in those people who have a certain smattering with this type of thing, but operators such as Cloudflare come with great options which also include free Cloudflare hosting plans.
Also, CDN Cloudflare has designed the content distribution network of the future, as the platform was created and developed with emerging technologies in mind so that today and tomorrow, their customers can benefit from the most advanced protocols of the Web. This also includes optimized security, performance, and reliability without the clutter of outdated technologies. The result: an easy-to-configure, affordable CDN that performs better than anyone you’ve tried so far.