Cisco Content Routers are the content routing elements of a larger, Cisco Content Delivery Network (CDN) solution, which includes content switching, content distribution and delivery, content services, and content management, as well as content routing. The Content Router 4450 is deployed at strategic locations within your network and operates in conjunction with Content Engines to redirect DNS requests to optimal Content Engines based on network proximity, presence of requested content, current Content Engine status including load and availability, and current network conditions including load.