Why to server images from subdomain While Hosting our images on our own webhosting, this is default in wordpress powered websites. while counting the request (this is the http request sent to the server shortly lesser the request the better the performance. This will be dividing the request to multiple domains) specially in wordpress is
WordPress is the most popular PHP & MYSQL based CMS (Content Management System). Almost all of the popular news sites (ie cnn.com), blogs and websites are made used wordpress.