Abstract: A Content Delivery Network comprises a virtual network overlaid on a network of geographically distributed content delivery nodes. The virtual network comprises a subset of the nodes selected to provide at least a minimum predetermined level of service to a requesting client. A virtual network controller resides on at least one virtual network node. The controller routes the requested media to at least one other virtual network node for formatting before delivering the suitably formatted media to the requesting client.

Abstract: An intermediary node, such as an edge node, in a content delivery network (CDN) intercepts a media transmission en-route to a client device. The media transmission and a client profile are analyzed to determine if the media requires additional processing to provide a customized media format before the media is routed to the client device. During message delivery in a CDN, an intermediary edge node intercepts a request for media content from a client device and determines a customized content format based on the request and the client profile before routing the request to an appropriate server.