a
content delivery network or
content distribution network (
cdn) is a globally distributed network of proxy
servers deployed in multiple
data centers. The goal of a cdn is to serve content to end-users with high availability and high performance. Cdns serve a large fraction of the internet content today, including web objects (text, graphics and scripts), downloadable objects (media files, software, documents), applications (e-commerce, portals),
live streaming media, on-demand streaming media, and
social networks.
The term cdn means many things to different people and is an umbrella term that covers a lot of different types of content delivery services. Video streaming, software downloads, web and mobile content acceleration, licensed/managed cdn, transparent caching, and services to measure cdn performance, load balancing, multi-cdn switching and analytics and cloud intelligence. It’s a complex ecosystem with a lot of vendors both large and small and some cdn vendors cross over into other industries like security and wan optimization.
[1]