What is a proxy server

The proxy service refers to the proxy server. Its function is to act as an agent for network users to obtain network information. It is a transfer station for network information and an intermediate agency between personal networks and Internet service providers. It is responsible for forwarding legal information. Network information, control and register forwarding.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

What is a proxy server?

The function of the proxy server is to obtain network information on behalf of network users. To put it figuratively, it is a transfer station for network information and an intermediary agency between personal networks and Internet service providers. It is responsible for forwarding legal network information, controlling and registering the forwarding.

As a bridge connecting the Internet and Intranet, the proxy server plays an extremely important role in practical applications. It can be used for multiple purposes. The most basic function is connection, and it also includes security, caching, and content. Filtering, access control management and other functions. More importantly, the proxy server is an important security function provided by the Internet link-level gateway. It works mainly at the conversation layer of the Open Systems Interconnection (OSI) model.

Introduction

With the rapid development of the Internet and Intranet, proxy servers play an extremely important role in practical applications as a bridge connecting the Internet and Intranet.

The proxy server is the transfer station for network information. Under normal circumstances, when using a web browser to directly link to other Internet sites and obtain network information, a request signal must be sent to get a response, and then the other party will send the information back. The proxy server is a server between the browser and the Web server. With it, the browser does not directly go to the Web server to retrieve the web page but sends a request to the proxy server. The request signal will be sent to the proxy server first. The proxy server retrieves the information needed by the browser and sends it to your browser. Moreover, most proxy servers have a buffering function, just like a large Cache. It continuously stores newly obtained data packets in its local memory. If the data requested by the browser is already in its local memory, exists and is the latest, then it does not re-fetch the data from the Web server, but directly transfers the data on the memory to the user's browser, which can significantly improve browsing speed and efficiency.

The proxy server can not only improve browsing speed and efficiency, but also implement network security filtering, traffic control (reducing Internet usage costs), user management and other functions. Therefore, it is both a network firewall technology and , and it can also solve the problem of insufficient IP addresses caused by many units connecting to the Internet.

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