Virtual Directories

I am wondering if someone could clarify a few points for me regarding Virtual Direcotries.

1. When would you use a VD?
2. what is the purpose of a VD?

I understand that you can group files that are located on another server if space is an issue
on a web server.

Thanks!
L

Virtual Directories are used to:

A) Add additional sites under a single IP Address or website.

B) Allows for the use of "outside" resources. Example. Let's say I wrote a bunch of functions and I want to use them with all of my sites, but I don't want to have to copy them into every site I create. I can just create a virtual directory to the location of the functions and use them from there.

Thanks for taking the time to answer my questions. I have an idiot at work who wants a VD, but I think they are a little confused.

Also, virtual directories in IIS define web applications and the scope of application and session variables.

http://msdn.microsoft.com/library/e...nbounderies.asp

VD's allow you to separate a url from a physical folder, you can put web files in c:\somefolder\somefolder2 and define it as a virtual directory named "myweb" and reference your web folder via http://myserver/myweb