A CDN, or Content Delivery Network, is a distributed network of servers that are used to deliver content, such as web pages, images, and videos, to users based on their geographic location. CDNs are used to improve the performance and availability of a website or application by serving content from servers that are closer to the user, rather than from a central location.
CDNs work by storing copies of content on servers located in different regions around the world. When a user accesses a website or application that is using a CDN, the CDN will redirect the user’s request to the server that is geographically closest to the user, in order to deliver the content as quickly as possible. This can improve the speed and performance of the website or application, especially for users who are located far from the central server.
CDNs are often used to deliver static content, such as images and videos, because this type of content does not change frequently and can be easily cached (stored) on the CDN servers. CDNs can also be used to deliver dynamic content, such as web pages, by caching the content on the CDN servers and serving it to users from the nearest location.
Overall, CDNs are a useful tool for improving the performance and availability of websites and applications by delivering content to users from servers that are closer to them.