A virtual directory is a friendly name, or alias, for a physical directory on your IIS Server hard drive that does not reside in the home directory. Because an alias is usually shorter than the path of the physical directory, it is more convenient for users to type. A virtual directory appears to client browsers as if it is in the web server's root directory, even though it can physically reside somewhere else.
A virtual directory can be used for different websites' physical folders or different folders of the same website. A virtual directory's physical location can be on the same IIS server or a different server, and we can mount it on an existing website.
For example, you have website pages at different locations in IIS server, such as d:VD. You can create a virtual directory and use it in an existing website. If you have a different web application...