jQuery framework can be loaded from Google, Microsoft or jQuery CDN(Content Delivery Network) and there are several advantages in doing so.
1. You always use the latest jQuery framework.
2. It reduces the load from your server.
3. It saves bandwidth. jQuery framework will load faster from these CDN.
4. The most important benefit is it will be cached, if the user has visited any site which is using jQuery framework from any of these CDN.
Load jQuery Framework from Google CDN
Load jQuery Framework from Microsoft CDN
Load jQuery Framework from jQuery CDN