Introduction to CDN

Solution

The solution to all the problems above is Content Delivery Network (CDN). A CDN is a group of geographically distributed proxy servers. A proxy server is an intermediate server between a client and the origin server. The proxy servers are placed on the network edgeThe network edge is the zone where a device or local network interfaces with the Internet.. As the network edge is close to the end-users, the placement of proxy servers helps quickly deliver the content to the end-users by reducing latency and saving bandwidth. CDN has added intelligence on top of being a simple proxy server as we will realize in the next lesson.

We can bring data near the user by placing a small data center near the user and storing copies of the data there. CDN mainly stores two types of data: staticThis type of data does not change frequently and remains on the servers for a long period. and ...