Q. What is a content delivery network (CDN)? A. A content delivery network or content distribution network (CDN) is a geographically distributed network of proxy servers and their data centers. The goal of a CDN is to serve content to end-users with high availability and high performance. CDNs serve a large portion 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. Schema Markup Language: