Shulou(Shulou.com)06/03 Report--

After purchasing the CDN service, users will be more concerned about the actual effect in the process of using it. First of all, you need to make sure that it has been activated successfully, and then follow the basic steps to add accelerated domain names and configure CNAME. After all these have been successfully completed, CDN can be used normally. Many users have a question, which is often asked, and that is how CDN works. Today we will discuss a variety of network technologies supported by CDN acceleration.

How does cdn work? When it comes to the working principle of CDN, it is necessary to mention a variety of network technologies that it depends on, among which load balancing, dynamic content distribution and replication, and caching technology are the main ones.

Load balancing technology

Load balancing technology is not only used in CDN, but also widely used in many areas of the network, such as server load balancing, network traffic load balancing. Load balancing in the network is to distribute the network traffic evenly to several servers or network nodes that can complete the same task as far as possible, so as to avoid the overload of some network nodes. This can not only improve the network traffic, but also improve the overall performance of the network.

Dynamic content Distribution and replication Technology

As we all know, the response speed of website access depends on many factors, such as whether there is a bottleneck in the network bandwidth, whether there is congestion and delay in the route during transmission, the processing capacity and access distance of the website server, and so on. In most cases, the response speed of the website is closely related to the distance between the visitor and the website server.

If the distance between the visitor and the website is too far, the communication between them also needs to be forwarded and processed by heavy routing, and network delay is inevitable. An effective method is to use content distribution and replication technology to copy most of the static web pages, images and streaming media data which account for the main body of the website to the accelerated nodes. Therefore, dynamic content distribution and replication technology is also a major technology needed by CDN.

Caching technology

Web caching service improves the response time of users in several ways, such as proxy caching service, transparent proxy caching service, transparent proxy caching service using redirect service and so on. With the Web caching service, users can minimize WAN traffic when visiting web pages. For corporate intranet users, this means caching content locally rather than retrieving web pages over a dedicated WAN.

For Internet users, it means storing content in their ISP cache without having to retrieve web pages through Internet. This will improve the access speed of users. The core function of CDN is to improve the access speed of the network, so cache technology will be another major technology adopted by CDN.

The above is the introduction of the technology applied in the working principle of cdn.

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