Content delivery network, translated as Content Delivery Network, referred to as cdn.

The basic idea is to avoid bottlenecks and links on the Internet that may affect the speed and stability of data transmission as much as possible, so that content can be transmitted faster and more stably. By placing node servers throughout the network to form a layer of intelligent virtual network based on the existing Internet, the CDN system can real-time analyze the network traffic and the connection and load status of each node, as well as the distance to the user and response time. and other comprehensive information to redirect the user's request to the service node closest to the user. Its purpose is to enable users to obtain the required content nearby, solve the congestion situation of the Internet network, and improve the response speed of users' access to the website.

The content distribution network is a strategically deployed overall system, including four requirements: distributed storage, load balancing, network request redirection and content management. Content management and global network traffic management are The core of CDN. By judging user proximity and server load, CDN ensures that content is served to user requests in an extremely efficient manner.