With the development of the network, users pay more attention to the speed of browsing the site, in order to allow users everywhere are able to access high quality, and to minimize the cost and management pressures generated by the site, cdn acceleration service was born.
What is CDN?
CDN stands for Content Delivery Network, ie, content delivery network. Its purpose is to add a new layer of network architecture in the existing Internet, the content of the site closest to the user posted to the network "edge" so that users can go to obtain the desired content, improve the response speed of the user access to the site .
CDN different from the mirror, because it is more intelligent than the mirror, you can do an analogy: CDN = more intelligent cache + mirror + traffic diversion. Therefore, CDN can significantly improve the efficiency of the Internet in the flow of information, a comprehensive solution to network bandwidth is small, user access to large, uneven distribution network problems technically, improve the response speed of the user access to the site.
To better understand the CDN, CDN look at the workflow. When a user visits the site has joined the CDN services, first determine the optimal CDN node closest to the user through DNS redirection techniques, while the user's request point to the node. When the user's request reaches the specified node, CDN server (cache on a node) is responsible for the content of the user request to a user.
Specific procedures: users want to access the website domain name in their browser, the browser request to resolve this domain name to the local DNS, local DNS requests sent to the site's main DNS, Primary DNS according to a series of strategies, then determine the most appropriate CDN node, and the result of the analysis (IP address) to users, user requests content to the site of a given CDN node.
What is CDN? What is high anti CDN?
What is high anti CDN?
Another defense is to accelerate the integration of high anti CDN, for high anti-cdn acceleration possible site operators who are not familiar with, it is the content delivery network, the existing Internet infrastructure by placing a server node in the entire network composed of virtual network layer on top.
High anti-DDoS protection CDN while many types of attacks, ignoring the CC website and hazards including malicious behavior brush flow, malicious reptile, Web application attacks, intelligent predict aggressive behavior, but also according to the degree of DDoS attacks, select different configurations defense version implements intelligent website acceleration and security.
The system is capable of high anti CDN distance and response time integrated information of the user to redirect a user's request from the service node nearest the user, mainly target ICP.
But there are a lot of CDN cache to accelerate the owners are not very understanding, high anti CDN and CDN cache to accelerate what difference does it make?
CDN cache to accelerate a product or system, referred to as Cache products, popular resources extracted by detecting the user's request, then downloaded and cached locally for subsequent acceleration to provide users with services, products target object is ISP.
High anti CDN for a variety of small and medium enterprises, with a network node does not make sense for the site to provide highly efficient and stable CDN acceleration service.
When users download or open a Web site, end users automatically connect to the nearest node of the safest, if it is found blocked node, immediately switch to the next node load, reducing node clogging.
And because many nodes, you can play hide the source IP station purposes, the attacker can see the IP address is not the source IP station, but away from his nearest node IP, thus guarantee the security of the site.
This is the high anti CDN and CDN cache acceleration biggest difference: not only accelerate, but also to protect the site safe.
