Getting Started with Proxy server novice

First of all, I would like to explain that we are here to talk about the proxy, is the proxy server, English name is proxy server. Generally speaking, for us these ordinary netizen its function has three (aside some advanced usefulness not to talk about, because we may not use):

One is through it, we can visit some of the sites that can not normally go. Don't believe you can open your browser and enter the "www.geocities.com" url right away. How? Do not have to look at the browser here to wait, not your network speed is slow, it is not without this site, but you can not access it (there are many of these types of Web site OH). Why can't I get access? The problem ... There are many kinds of statements, most of which are said to be limited to access to the domestic network, so some sites can not go. How can I access these sites? After reading this article you will know!

The second is through it to speed up our browsing some Web site speed. Sometimes we visit some foreign or Hong Kong and Taiwan websites, as slow as a snail. But as long as you choose the right proxy server, speed can be promoted, and sometimes these speed of ascension is very obvious oh!

The third is to connect the Internet and the intranet as firewall (firewall): Because all intranet users access the outside through the proxy server, mapping only to an IP address, so the outside can not directly access the intranet, and can set IP address filtering, Restrict the internal network's access to the outside; In addition, two intranet networks that are not interconnected can also exchange information through a Third-party proxy server.

If you have seen the above in the past, then it seems necessary to try using a proxy server.

Why does using a proxy server allow us to access some sites that are otherwise inaccessible? Why is it quicker to browse foreign websites after using it? Image of the said: Proxy Server is a transit point for network information. In general, we use a Web browser directly to connect to other Internet sites to obtain network information, we have to send a request signal to get answers, and then the other side of the information sent back in bit mode.

Proxy server is a server between the browser and the Web server, with it, the browser is not directly to the Web server to retrieve the page but to the proxy server to send a request, the request signal will be sent first to the proxy server, The proxy server retrieves the information that the browser needs and sends it to your browser. Also, most proxy servers have buffering capabilities, it's like a big cache, it has a lot of storage space, it keeps storing the new data on its native memory, if the data requested by the browser already exists and is up to date on its native memory, Instead of getting data back from the Web server, it sends data directly from the storage to the user's browser, which can significantly improve browsing speed and efficiency (speed varies depending on the location of the proxy server and network transmission), And most of the foreign network is not restricted access to the site or the different restrictions, so we have a great opportunity to access the proxy server to those who could not go to the site.

More importantly, Proxy Server (proxy) is an important security feature provided by Internet link-level gateways, and it works primarily in the dialogue layer of the Open Systems Interconnection (OSI) model.