|"Now my point is that is there any way that I enter a set of numbers in the web address bar so that I am directed straight to "www.xyz.com/MUSIC" rather than reaching the index page of the site first and then going to MUSIC link?"|
No. As you correctly state, the dotted quad will only take you to the index page of the default web site on the computer hosting the web server.
Dotted quads identify computers, not web pages.
(Disclaimer: That's not 100% accurate. You can have several virtual servers on the same computer with different dotted quads. In that case using the dotted quad as the URL would take you to the index page of that particular virtual server. But you still need to use proper URLs to access other pages.)