Content Delivery Network - Microsoft AJAX Joins In
I digress… Content Delivery Networks (CDN) have been a staple for popular content on the internet since the beginning of web time. Essentially CDNs replicate content to computer servers that are geographically closer to you, so that when you request a very popular file, the request-response communication does not have to travel around the world to get it. In addition to proximity, common files referenced across websites are cached using a single URI/URL (local browser cache, router cache, proxy server caches, and CDN server caches). *This is why you will usually see a file version number in the URL so that newer versions of the file do not have to worry about existing file caches.
So, Microsoft’s AJAX library joined the ranks of CDN notoriety in September 2009 with SSL support released a couple of days ago. Now, any website (including non-Microsoft technology websites) can use Microsoft’s AJAX library with all of the benefits of a CDN. Enjoy!