Port 808 1 is used to fix the proxy service to WWW, which is defined in Hypertext Transfer Protocol. Used to provide Web services for web pages, which can realize web browsing. When visiting a website or using a proxy server, the port number ":808 1" is often added. However, the server administrator needs to set the server port number so that only one port can be recognized.
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"port" is a free translation of English port, which can be considered as the exit of communication between equipment and the outside world. Ports can be divided into virtual ports and physical ports, where virtual ports refer to the ports inside the computer or in the switch router and are invisible.
Such as port 80, port 2 1, port 23, etc. Physical ports, also known as interfaces, are visible ports, RJ45 network ports on the computer backplane and RJ45 ports, such as switch router hubs. Phones using RJ 1 1 jack also belong to the category of physical ports.