cdn

 

In the cloud era, what is CDN?

cdn

    The full name of CDN is Content Delivery Network, that is, Content Delivery Network . The basic idea is to avoid bottlenecks and links that may affect the speed and stability of data transmission on the Internet as much as possible, so that content transmission is faster and more stable. By placing node servers everywhere in the network to form a layer of intelligent virtual network on the basis of the existing Internet , the CDN system can real-time based on network traffic and the connection and load status of each node, as well as the distance to the user and response time Such comprehensive information redirects the user's request to the service node closest to the user. Its purpose is to enable users to obtain the desired content nearby, solve the situation of Internet network congestion, and improve the response speed of users visiting websites.

    CDN is a content distribution network built on the network, relying on edge servers deployed in various places, through the load balancing, content distribution, scheduling and other functional modules of the central platform, so that users can obtain the desired content nearby, reduce network congestion, and improve user access. Response speed and hit rate. The key technologies of CDN mainly include content storage and distribution technology.

    The basic principle of CDN is to widely use various cache servers, distribute these cache servers to regions or networks where user access is relatively concentrated, and use global load technology to direct users' access to the nearest working cache when users visit a website. On the server, the cache server directly responds to user requests.