Type of proxy server generally Http, Ftp, Socks, Telnet and other types of proxy servers, Http, Ftp and Telnet proxy server name suggests is each proxy web browsing, file transfer, and remote login, and Socks is a goodly portion of the Almighty agent – in front of all the functions that can be achieved. Socks proxy is divided into Socks4 and Socks5; Socks4 proxy only supports TCP protocol (Transmission Control Protocol), Socks5 proxy support for TCP and UDP (User Datagram Protocol), also supports a variety of authentication mechanisms, server-side domain name resolution. Socks4 able Socks5 can dry not vice versa, such as ICQ can only be used Socks5 proxy.
In general, we use a web browser to connect directly to other Internet sites to obtain network information, is directly linked to the destination site server, and then by the destination site server sends information back. Proxy server is between the client and the Web server to another, and then with it, the browser is not directly to the Web server to retrieve web page but the request to the proxy server, the signal is then sent to a proxy server, by the proxy server to retrieve the information needed by the browser and send to your browser. In the box, enter the URL address of the site you want to access, click on the proxy browser will open a new window link proxy server, you can wait a few seconds, if appears unable to link servers and other errors, please try to select other servers above, because the proxy server resource consumption is relatively large, and there is timeliness, so sometimes can not be opened, the proxy must try several times. Automatically updated with the latest available servers every day.
Most of the proxy server has a buffer function, as if a large Cache, it has great storage space, it will continue to obtain new data storage to its memory on the machine, if the browser the requested data in its present the memory on the machine already exists and is the latest, it is not re-fetch data from a Web server, but directly to the memory on the data to the user’s browser, so that we can significantly improve browsing speed and efficiency.
More importantly: the proxy server is the Internet link-level gateway (Gateway) is an important security feature provided by its work mainly in the Open Systems Interconnection (OSI) layer model of dialogue, and thus play a role of a firewall.
For these reasons, most of the proxy server is used to connect INTERNET (Internet) and INTRANET (LAN). In China, the so-called multi-media public information network and China Education Network are independent of large state-level local area network; it is isolated from the Internet. For a variety of needs, some groups or individuals set up between the two networks, proxy server, if we know the address of the proxy server, you can use it to reach overseas sites.