Proxy
出典: くみこみックス
A proxy is also known as proxy server and application level gateway. It is a form of technologies created for the use of numerous organization institutions and men and women when it comes to their network and Internet access needs. With this, a proxy acts as a personal computer that serves as a mediator in between the computer systems that make up the nearby network of a firm and the World wide web or any other big-scale network.
A proxys operate begins when incoming information is requested by a precise personal computer in the local network. When this takes place, the proxy guarantees that the data correctly enters and proxy list on-line passes via a single of its ports. Subsequently, the information is forwarded to the unit that requested it by proxy list on-line means of another port. Therefore, by providing a implies of prohibiting the direct access among networks, a proxy can avert hackers and unauthorized folks from getting sensitive details such as the internal addresses of a group.
A proxy has 2 sorts. These contain:
(1) the http proxy and
(two) the SMTP proxy.
The former acts as a gateway for Net access, although patent pending the latter acts as a gateway for e mail. Apart from controlling the access level of external networks, the proxy can also restrict computers within the nearby network in terms of the on the web resources they could access. This is specially valuable in circumstances when the network administrator wants to stop the users from opening internet sites they are not supposed to access.
A proxy can also cache web pages. This is a feature that allows the main personal computer to store copies of downloaded Internet pages in its challenging disk. When a pc in the local network requests for an external URL, a copy of that URL is stored in the server. Subsequently, when another personal computer requests for the identical URL, the proxy can offer the stored copy rather of acquiring the original one from the Internet. This, of course, minimizes the time for acquiring details.
