URL (Uniform Resource Locator) Uniform Resource Locator is composed of a string of simple text characters. A URL that conforms to the specification corresponds to a specific resource on the server (such as an HTML page, an image, etc.).
★scheme protocol: The
commonly used protocols are as follows:
http——Hypertext transfer protocol resource (Hypertext file on www server)
https——Hypertext transfer protocol using secure socket layer
ftp——File transfer protocol (on FTP server) files)
mailto - email addresses
ldap - Lightweight Directory Access Protocol search file -
files shared on your local computer or online
news - Usenet newsgroups
gopher - Gopher protocol (files on a gopher server)
telnet - Telnet protocol
wais - a wais server. ★hostname host address
: it can be a domain name or an IP address
★path The specified path of the network resource in the server
★parameter parameter If you want to pass parameters to the server, enter the
★query query string in this section If you need to query the content from the server, edit the
★fragment fragment page may be divided into For different segments, if you want to visit the webpage and directly reach the specified location, you can set it in this part
The relationship between OSI seven layers and TCP/IP five layers and related protocols