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August 2, 2016 08:00 am GMT

CDN: When do You Really Need One?

Content delivery networks – CDN for short – are on everyone’s lips, and are often on the wishlist of bloggers. You’ll often read that a CDN will make your website insanely fast and that you just have to get one. The only question is: do you really need it or are there other, possibly better, ways? What is a CDN? A CDN is a distributed compound of servers that are located all over the world. Their only task is to cache a website’s static data, meaning images, CSS, and JavaScript files. The providers copy your static data onto their servers. Then, these files are always delivered from the server that’s the closest to your visitor. A CDN also works as a load balancer; most CDN providers have server networks per location, which means that they can easily handle a larger amount of requests than your server, which your website is on. That’s the theory. From that, one can conclude that a CDN should always deliver files faster than your own server. This doesn’t always have to be true, however, as the deciding factor is the response time of the server in question. In certain scenarios, this can actually be better […]

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