CDN reduces the bandwidth pressure of the origin server by distributing cached content across multiple servers located in different geographical locations. When a user requests content, the request is routed to the nearest CDN server, which delivers the cached content directly to the user. This reduces the need for the request to travel all the way back to the origin server, thereby reducing the bandwidth usage and load on the origin server.
For example, if a user in New York requests a video from a website hosted in Los Angeles, the request would typically travel across the country to the origin server. However, if the website uses a CDN, the request would be routed to a CDN server in New York, which would deliver the cached video directly to the user, significantly reducing the bandwidth usage and load on the origin server.
Tencent Cloud's CDN service, for instance, leverages a global network of edge servers to cache and deliver content efficiently, reducing the load on origin servers and improving user experience through faster content delivery.