Uniform URL Resource Identifier

Uniform Resource Locator

A URL (Uniform Resoure locator Uniform Resource Locator) is the address of a WWW webpage, like a street address on a city map. The URL uses numbers and letters in a certain order to determine an address.

The first part of the URL, http: //, indicates the type of the file to be accessed. On the Internet, this almost always uses HTTP (Hypertext Transfer Protocol, Hypertext Transfer protocol. because it is used to convert web pages .) sometimes, file transferprotocol (FTP) is also used to transmit software and large files (FTP is used as the download URL for many software download websites ); telenet (Remote logon) is mainly used for remote conversations, file calls, etc. It means that the browser is reading a file outside the local disk, rather than a remote computer.

The URL consists of the following parts from left to right:

· Internet resource type (Scheme): indicates the tool that WWW client programs use for C. For example, "http: //" indicates the WWW server, "ftp: //" indicates the FTP server, "Gopher: //" indicates the Gopher server, and "New:" indicates the newgroup newsgroup.

· Server address (host): The domain name of the server where the WWW webpage is located.

· Port: Sometimes (not always like this). For access to some resources, the corresponding server must provide the port number.

· Path: Specifies the location of a resource on the server (the format is the same as that in the DOS system, which usually consists of a directory/subdirectory/file name structure ). Like a port, the path is not always required.

URL address format: Scheme: // host: Port/path

The domain name of a website is a typical URL address.

The customer program first sees HTTP (Hypertext Transfer Protocol) and then knows that html links are processed. The following domain name is the site address, and finally the directory/BBS

Note that all servers on the WWW are case-sensitive and case-sensitive. Therefore, be sure to use the correct URL format.

Uniform URL Resource Identifier