Proxy

出典: くみこみックス

2012年8月20日 (月) 02:58の版

A proxy is also identified as proxy server and application level gateway. It is a type of technologies created for the use of numerous business institutions and men and women when it comes to their network and Web access requirements. With this, a proxy acts as a laptop or computer that serves as a mediator among the computer systems that make up the nearby network of a firm and the Web or any other large-scale network.

A proxys perform starts when incoming information is requested by a precise computer in the local network. When this occurs, the proxy guarantees that the data correctly enters and passes via 1 of its ports. Subsequently, the data is forwarded to the unit that requested it via an additional port. Hence, by providing vin check a means of prohibiting the direct access between networks, a proxy can avert hackers and unauthorized people from getting sensitive information such as the internal needs addresses of a group.

A proxy has needs two varieties. These consist of:

(1) the http proxy and

(two) the SMTP proxy.

The former acts as a gateway for Net access, even though the latter acts as a gateway for e-mail. Apart from controlling the access level of external networks, the proxy can also restrict computers inside the neighborhood network in terms of the on-line resources they could access. This is specifically valuable in conditions when the network administrator wants to stop the customers from opening websites they are not supposed to access.

A proxy can also cache internet pages. This is a feature that enables the primary computer to store copies of downloaded Web pages in its tough disk. When a laptop or computer in the nearby network requests for an external URL, a copy of that URL is stored in the server. Subsequently, when another personal computer requests for the same URL, the proxy can give the stored copy rather of getting the original a single from the Web. This, of course, minimizes the time for acquiring info.