CDN stands for “content delivery network” and the purpose of using one is to improve the overall speed of your site by improving your blog performance by decreasing server load and optimizing your website making things load faster. With a faster loading website it can help you achieve a better search engine ranking as well as make your readers happy because most people want to see what they’re looking for RIGHT NOW!
I’m currently using Speedy Mirror one one of my sites. They used to offer a ton of bandwidth (50 GB) at no charge, but now they offer a free 5GB of bandwidth for free and this month I have about 1GB left. Need more? you can join the paid service. I use this in conjunction with the WordPress plugin W3 Total Cache. Instead of write a tutorial on how to set up the CND with the wordpress caching pluign, just visit freshtutorial.com for step by step instructions and screenshots.
With Speedy Mirror, your content is spontaneously duplicated to our servers, which are based in many different areas around the world. Your users will automatically download from the nearest mirror, so they will experience higher download speeds. Your bandwidth will be precisely calculated and you will pay only for the gigabytes transferred by our network.
Another free option is CloudFlare which is a CDN and I’m now using it for this website. They offer premium paid services as well. Basically all a user has to do is change their name server records and your site should be online even if your server goes offline. You can only modify your name servers settings if you own your own domain name. You will have to switch your name servers to CloudFlare to get their protection and CDN services. Doing a dig or checking whois would reflect CloudFlare’s name servers. I don’t understand why you’d pay for the service yet unless they limit the number of domains you can have in your account. You can see a list of the worldwide servers here, also for sites using Cloudflare it means site loading times should be very quick even if you’re connecting across the world using a VPN. They also have a WordPress plugin.
Read about CDN benefits here. And Cloudflare funding: $22 Million +
October 5th Update:
I’ve been using this service for about 10 days now and I’m happy with it. Here are some stats from the control panel. I notice my sites run faster and I have saved some bandwidth.