The role and working mechanism of proxy Server

The proxy server has four functions:

First, improve the speed of access. Because the data requested by the customer is stored on the proxy server's hard disk, so the next time this customer or other customers request the same destination site data, will be directly from the proxy server to read the hard disk, the proxy server played a role in caching, the popular site has a lot of customer access, Proxy server advantage is more obvious.

Second, proxy can play a role in the firewall. Because all users using a proxy server must access the remote site through a proxy server, the appropriate restrictions can be set on the proxy server to filter or block out certain information. This is the local Area network network management to the LAN user access limits most commonly used method, is also the local area network user why cannot browse some websites the reason. If a dial-up user uses a proxy server, it must also obey the access restrictions of the proxy server, unless you do not use this proxy server.

Third, through the proxy server to access some of the Web site can not be directly. There are many open proxy servers on the Internet, when the client is restricted to access rights, and the access rights of these proxies are unrestricted, just the proxy server is within the client's access range, then the client can access the target website through the proxy server. Domestic colleges and universities more use of education network, can not go abroad, but through proxy server, can achieve access to the Internet, which is the reason for the hot proxy server in the university.

Iv. security is improved. Whether on the chat room or browsing the site, the purpose of the site can only know that you are from the proxy server, and your real IP can not be detected, which allows users to improve the security.

The working mechanism of the proxy server

Proxy server's working mechanism is very much like our life frequently mentions the agent, assumes your own machine is a machine, you want to obtain the data by the Server B provides, the proxy server is C, then the concrete connection process is this.

First of all, a machine needs the data of B machine, a directly with the C machine to establish a connection, C machine received a machine data request, and B-machine to establish a connection, download a machine requested on the B-machine data to the local, and then send this data to a machine, complete the agent task.