Basic Knowledge of Proxy

English name: Proxy Server,
Function: Deputy users access to network information. The image that it is a transit point for the network information.
Under normal circumstances, we use the Web browser to connect directly to other Internet sites to obtain information network, is directly connected to the purpose of the site server, and then by the purpose of the site server to send back information. Proxy server is in the range of browsers and Web servers between another server, it has been following the browser rather than directly to the Web server to get back to the page, but issued a request for a proxy server, the signal will be sent to the proxy server, By the proxy server to get the browser and the information they need to send to your browser.
Www.51an.com in the URL box you want to visit the Web site address, click agent will open a new browser window to link a proxy server, you can wait a few seconds, if the link can not appear at this time, and other server error, please above Try to choose the other server, proxy server because of the large consumption of resources, and there are time-sensitive, so sometimes can not open, we must try several times a proxy server. Automatic Updates can be used day-to-date server.
Most of the proxy server has a buffer function, just like a big Cache, it has a lot of storage space, it will continue to get new data stockpile to its local memory, the browser if the requested data in it Machines already exist on memory and up-to-date, it will not re-check the data from the Web server, and the memory directly on the data to the user's browser, which can significantly increase the speed and efficiency of the browser.
More importantly: the proxy server is the Internet gateway provided by the link level is an important safety feature, which is mainly in the open systems interconnect (OSI) layer model of dialogue in order to play the role of the firewall.
For these reasons, most of the proxy server is used to connect INTERNET (Internet) and INTRANET (LAN). At the national level, the so-called China Public Multimedia Information Network and Education Network is an independent state-level large-scale local area network, and is isolated from the Internet. For a variety of needs, some groups or individuals in the network between the two set up a proxy server, if we know the address of the proxy server, you can use it to reach Web site abroad.