What is CDN? What are the advantages of using CDN?

CDN The full name is Content Delivery Network, The content distribution network . Its purpose is to pass on the existing Internet Add a new layer of network architecture , Publish the content of the site to the network closest to the user " edge ", So that users can get the content they need nearby , solve Internet The state of network congestion , Improve the response speed of users to visit the website .

In short , Content publishing network (CDN) Is a strategic deployment of the overall system , Including distributed storage 、 Load balancing 、 Redirection and content management of network requests ４ Elements , And content management and global network traffic management (Traffic Management) yes CDN At the heart of .

CDN What's the role ？

CDN Can handle the whole website page 70%～95％ Content visits , Thus, the concurrency of the website is solved , This reduces the access pressure of the source server , It also improves the performance of the website 、 Scalability and security . Store the content in the original server of the website to the cache service distributed everywhere (Cache Server) in （ That is to say CDN The node of ）, The dynamic flow of the network is distributed and controlled through the intelligent central management system , So as to improve the response speed of user access and the availability of services , solve Internet Network congestion , Improve the response speed of users to visit the website .

CDN What to do in the face of an attack ?

The domain name is resolved to the resolution record value provided by us , Then be attacked , The amount of attack will only hit us CDN Node , Therefore, the source site server will not be affected when the website is attacked .CDN Domestic nodes （ The Chinese mainland ） The domain name must be filed .

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IP The paragraph is as follows ：

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