About this business in the network security protection, the user will encounter various issues raised. For example, home computers and mobile phones are listening how to solve? Sites not open how to solve? Website is DDoS ***, the server is pulled into the black hole, how quick fix? The domain how anti-seal? What CDN cache to accelerate that? What is the principle running through it, and so on? Today ink security at major share CDN cache to accelerate the works.
First CDN what is it?
CDN stands for Content Delivery Network,) that is, content distribution. In a nutshell is the static resource files (pictures, videos, scripts, etc.) to the cache server closest to the user's location. Therefore, the user requesting access to the site, you can quickly access the content they want. So as to solve the cross-operator, cross-regional, low-bandwidth, response speed of the CPU load is small due to the slow and other issues.
Then CDN techniques may be implemented in addition to the conditions of the client further comprises:
1. providing the user with direct access to the site resources, i.e. a so-called cache server;
2. Cache servers are to be captured from the original content site, referred to as the source station ;
3. user access request from the user will be directed closer to the cache server via DNS redirection techniques to fetch desired content to the user.
Finally CDN cache acceleration works:
the site uses a CDN cache acceleration, the user sends a request to access, first through DNS redirection techniques to confirm CDN node closest to the user, and the user's request point to the node. If the node is not the result of customer needs content, the cache server will search the contents of the customer's needs results in the source site server, find the result will be saved to a local cache servers, and finally the user requests content desired result is returned to the user end. To save the result of the second user or to different users request the same access problem may be a very short time and then returns the result to the client, so that faster response speed to the user terminal. And after resolved through intelligent DNS, users access the same service provider's server, regardless of access network or north with the southern network, it is the same response speed. This fully embodies the characteristics of the CDN cache acceleration, giving users access to the site also brings convenient conditions.