Do I need to specify a webpage's url?

Do I need to specify a webpage's url?

pI've uploaded several files to my server and it's really quite baffling.
The home page is saved as codeindex.html/code, and when I type in the URL
of said page it miraculously, and quite successfully shows the right page.
What about my other pages? I have linked to them from the home page with
the following code:/p pcodelt;a href=http://www.example.com/about/gt;About
Uslt;/agt;/code/p pHow does my html file, presumably called about.html,
supposed to know that its URL is a href=http://www.example.com/about/
rel=nofollowhttp://www.example.com/about//a? I am dubbing this The
Unanswered Question because I have looked at numerous examples of metadata
and there is nothing about specifying the URL of a page./p