A network of servers optimised for supplying data to each individual client. Servers are normally set up to supply content to geographical areas, or bypass bottlenecks by using alternative routes from point to point.

(CDN) A network designed for optimal delivery of content.

A CDN maintains multiple locations with copies of the same content, and uses information about the end user and the requested content to deliver the most appropriate content to that end user. Customers of a CDN tend to be companies that want to offer their content to geographically distributed, large audiences.

a special ISP that offers a wide range of webcasting services, including encoding, server hosting and bandwidth management