What does url mean?

On the WWW, every information resource has a unified and unique address on the Internet, called URL(Uniform Resource Locator), which is the uniform resource location symbol of WWW, that is, the network address.

URL consists of three parts: resource type, host domain name where the resource is stored and resource file name. It can also be considered to be composed of four parts: protocol, host, port and path. URL is also called dynamic page, dynamic link, which means "?" Appears in the URL. Such parameter symbols, as well as URLs with aspx, asp, jsp, php, perl and cgi as suffixes.

Format description of url:

Specify the transport protocol used, and the following table lists the valid scheme names of protocol attributes. The most commonly used protocol is HTTP, which is also the most widely used protocol in WWW.

File resources are files on the local computer. Format file:///,pay attention to three slashes after it. Access resources through Ftp. Format FTP://. Gopher accesses this resource through Gopher protocol. HTTP accesses resources through http. The format HTTP://HTTPS accesses resources through secure HTTPS.

Above content reference: Baidu Encyclopedia -URL format