What is Content Delivery Network (CDN)?

What is a CDN?

A Content Delivery Network, commonly known as CDN, comprises of a group of geographically distributed servers focused on providing fast delivery of Internet content. The CDN plays a very important role in quickly transferring the assets which are required for efficient loading of content, e.g. javascript files, HTML pages, images, style-sheets, and videos.

In recent years, CDN has gained popularity in today’s world among internet giants, such as Netflix, Facebook, and Amazon. 

A CDN doesn’t actually host the web content but it does help in caching content at the network edge which helps in improving the website performance i.e. accelerate the response time or web page loading time. 

Benefits of using one

1. Improved performance and lower latency

According to a Google web performance engineer, Ilya Grigorik,

“Using a CDN allows us to terminate the connection close to the user, which can significantly reduce the cost of TCP and TLS handshake. For best results, you should be using a CDN to serve both static and dynamic content.”

2. Traditional web hosting solutions aren’t enough

The traditional web hosting methods are not enough anymore and a CDN network made up of several edge servers deployed in various geographical locations now plays a very important role and surpasses the computing resources of traditional web hosting and delivers high-quality and rich multimedia content in a cost-effective and reliable way.

3. SEO advantages

In 2010, Google announced that the website would begin to affect the search engine rankings. So, faster websites have better chances of higher SERPs. So, by using CDNs, you can improve your website performance and thus get a higher number in Google rankings.

4. Reliability

CDN’s architecture provides reliability because if any point of presence (PoP) is down, the request is routed to the next closest / best point of presence available. It enables redundancy and ensures a pleasant web experience for users. 

5. Simple integrations

CDN integrations and deployment is very easy and it only takes a few minutes to implement a CDN. CDN can be integrated with almost all kinds of frameworks, such as WordPress, Joomla, Drupal, or even with Laravel or Zend Framework.

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