HTML Links…
you click on a link in an HTML document like this: Last page, an underlying <a> tag points to a place (an address) on the Web with an href attribute value like.
The remaining parts vary depending on the protocol, but the vast majority of URLs you will encounter use the http protocol; exceptions include file URLs, which link to local files on your own hard drive, ftp URLs, which work just like http URLs but link to things on FTP servers rather than web server, and mailto URLs, which can be used to invite a user to write an email message to a particular email address.
The second part of the example URL above is the fully qualified domain name of the website to connect to. In this case, the fully qualified domain name is www.computeronlineworld.com this name identifies the web site containing the page. The term “fully qualified domain name” refers to a complete website or other computer’s name on the Internet. The term “domain name” usually refers only to the last part of the name, in this case which has been registered for that particular company’s exclusive use. For more information about registering domain names, see the setting up websites entry.
The third part of the example URL is the path at which this particular web page is located on the web server. In this case, the path is /newfaq/basic/url.html. Similar to a filename, a path usually indicates where the web page is located within the web space of the website; in this case it is located in the basic sub-folder of the newfaq folder, which is located in the top-level web page directory of our website.