Principles of Content-Distributed Network and its applications

Content-Distributed Network is called in another way Content Delivery Network (CDN). In CDN a new layer of network architecture is added to the original ones. The managers of webs send the updated information to the nodes which are nearest to users so that users can obtain it more quickly. That means the information in one server is sent to several server which is near to users. CDN avoids network congestion and increases the speed of visiting. CDN is suitable for the networks which have narrow bandwidth, large traffic and uneven-distributed nodes. Now CDN can support not only static words and graphs but also Streaming Media. In the future CDN will have a promising market.