CDN (Content Delivery Network) is a global network between the client and the server. CDN is a group of edge servers, strategically placed all around the globe. So, end users get data on low latency (Which means getting your content as fast as possible) from their nearest CDN servers.
CDN serve all request no matter, how far your location is. With the help of CDN, not just end users, the origin server also gets relief from the load. Due to the utilization of CDN servers, websites achieve high performance.
CDN is not replacing web hosting, it just caches content like HTML pages, Javascript files, CSS stylesheets, images (PNG, JPG, SVG, and GIF), audio (MP3, WAV, AIFF) and videos which improve performance but CDN can’t fulfil the need for web hosting.
Benefits of using CDN:
- Website Load Time: In today’s world, nobody like delay’s performance of the website. Everybody wants the site must open in just one click. With the help of CDN, websites deliver content as fast as possible.
- Security: Protection from DDOS-based attacks helps sites to deliver content to their authentic consumers.
- Availability: Due to CDN’s huge network placed all around the world, if any hardware failed still the consumers get their content. It’s because of the distributed network. So, availability is the utmost priority of every site.
Due to the above benefits bandwidth costs are also reduced. The end aim is to improve the user experience in terms of site speed and also global reach for some sites like Facebook, and Instagram, etc. CDN is the most successful tool for providing content with reliability and performance on a global scale.
CDN use two major components edge servers and points of presence. Apart from these two, there are a lot of things like route traffic to their correct destination, mitigation of cyber attacks, and utmost priority is availability.
The point of presence is a location where we have a combination of edge servers. It’s also referred to as POP.