[Zz] what is cdn technology?

CDN stands for content delivery network (CDN. By adding a new network architecture to the existing Internet, the website content is published to the "edge" closest to the user's network, so that users can obtain the desired content nearby, solves Internet network congestion and increases the response speed for users to access websites. It comprehensively solves the problem of slow response speed caused by low network bandwidth, large user traffic, and unevenly distributed outlets.
Based on users' proximity and server load judgment, CDN ensures that the content provides services for users' requests in an extremely efficient manner. In general, content service is based on the cache server, also known as the proxy cache (surrogate). It is located on the edge of the network and is only one hop away from the user.
At the same time, the proxy cache is a transparent image of the content provider's source server. This architecture enables CDN service providers to represent their customers, that is, content providers, to provide end users with the best possible experience. The CDN technology can process 70%-of the entire website page ~ 95% of content access Traffic reduces the load on the server and improves the performance and scalability of the website.
CDN is different from general images because it is more intelligent than images, or it can be used as a metaphor: CDN = more intelligent images + cache + traffic diversion. Therefore, CDN can significantly improve the efficiency of information flow in the Internet.
In general, CDN is a strategically deployed overall system that can help users solve distributed storage, Server Load balancer, network request redirection, content management, and other issues; CDN represents a quality and order-based network service model.