The default port number of HTTP protocol is "80". You can access the website by adding ":80" to the HTTP address (commonly known as "website"). However, because the default port number of web browsing service is 80, it can be omitted, just enter the website address instead of ":80".

"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.

Well-known ports are well-known port numbers from 0 to 1023, which are generally assigned to some services. For example, port 2 1 is assigned to FTP service, port 25 is assigned to SMTP (Simple Mail Transfer Protocol) service, port 80 is assigned to HTTP service, port 135 is assigned to RPC (Remote Procedure Call) service and so on.

Port 80 is open to HTTP (Hypertext Transfer Protocol), which is the most commonly used protocol for surfing the Internet and is mainly used for transmitting information on the World Wide Web. "