The webmaster who uses overseas servers must have heard of CDN acceleration. If it is an overseas server, how can the access speed before buying, many server vendors will say that this server will support the global CDN acceleration. Is this CDN acceleration different from the dual -line server?

　　The difference between CDN acceleration and dual -line server:

　　First of all, we need to understand what CDN is accelerated. Popular understanding is that when using the CDN's original delay in 200ms, when using the Ping command, it may only need to only see 100ms. To be precise, CDN is the content of the content issuance. The main purpose of implementation is to allow users to obtain relevant content nearby, so as to access the website faster.

　　Generally speaking, CDN is still different from the image. We can understand this. CDN is equal to the intelligent mirror image plus cache and then add traffic diversion. Therefore, it is not difficult to see that CDN can significantly improve the efficiency of network information flow. Technically, it can solve the problems of the problem of large visits, large visits, or uneven distribution of outlets. So as to improve the response speed of user access.

　　In order to better understand the CDN, we can understand the workflow of CDN. When a user visits a website with CDN acceleration services, it will be redefined by DNS to technology to determine the nearest CDN node, and then bring the user's request to this node. Then return the request content to the user on this CDN server node.

　　So, what is the dual -line server again?

　　The dual -line server refers to the link layer technology connected by the network. It has a variety of network exports in the computer room. It can allow users to automatically allocate through the link and access the website faster.

　　The dual -line server is a product under this special environment in China. Basically, there will be no such situation in other places. Dual -line can only solve problems such as Netcom or Telecom. Other problems in network transmission still cannot be solved justly For example, interoperability with each ISP.

　　Overseas server CDN accelerates, it is more to increase the access speed of the website, while the dual -line server has only solved a special problem, there is still a big difference in the overall. Therefore, it is not difficult to see that technically, CDN is more global, and dual -line servers are only limited to domestic. The above is the difference between CDN acceleration and dual -line server. Therefore, it is possible to choose CDN overseas servers, but there is no double -line server in overseas servers.