What’s the difference between the Windows Azure Content Delivery Network and Windows Azure Storage?
The Windows Azure CDN supplements Windows Azure storage to enable in-region delivery of the content. The content is stored in Windows Azure storage and can be delivered either directly from the Windows Azure store or from the Windows Azure store through the CDN. Both services are capable of delivering the same stored content. Content owners need to decide which content will benefit more from CDN delivery (multiple repeated accesses by many users) or from direct Windows Azure Storage delivery (more customized or less-used content, for example) balanced with overall price and performance goals. The application needs to render the correct URLs (Windows Azure CDN or direct Windows Azure Storage) accordingly.