example in Apache

Thats set up in the server of the third party site. For example in Apache you would set upa virtual host for it. In IIS you would use a host header. Thats assuming its the sort of host who will do this for you.

licencing

I have always found it very confusing about what the SBS 2003 licencing covers as far as Web hosting.
I am interested in getting SBS 2003 for purely hosting a public Web site with SQL Server as the backend database. I like the fact that premium includes ISA for a firewall and that IIS, SQL Server and ISA is all on one box. I do not want to have my company files on the same server and I understand there are security implications in having a firewall, database and web server on one box. I just want SBS 2003 for Web hosting. SBS 2003 Premium appears to be very cheap for getting ISA, SQL Server and Windows Server 2003 - what's the catch.
Questions? Does the license agreement allow me to do this?
How does Cal's and per seat licensing affect this? If I order a 5 Cal license does that mean I am licensed for only 5 users visiting my Web site or does a per seat license mean I can have unlimited Internet users accessing my SBS Server 2003 (within it's hardware resouces). Do I need a Cal for every user who visits my Web site? If there is a restriction to the maximum number of Internet users visting a Web site, what is it?
Confused please advise.

Dedicated hosting service

Dedicated hosting service: the user gets his or her own Web server and gains full control over it (root access for Linux/administrator access for Windows); however, the user typically does not own the server. Colocation web hosting service: similar to the dedicated web hosting service, but the user owns the server; the hosting company provides physical space that the server takes up and takes care of the server. This is the most powerful and expensive type of the web hosting service. In most cases, the colocation provider may provide little to no support directly for their client's machine, providing only the electrical, Internet access, and storage facilities for the server.

Web hosting service

A web hosting service is a type of Internet hosting service that allows individuals and organizations to provide their own websites accessible via the World Wide Web. Web hosts are companies that provide space on a server they own for use by their clients as well as providing Internet connectivity, typically in a data center. Web hosts can also provide data center space and connectivity to the Internet for servers they do not own to be located in their data center, called colocation.While in theory any animal might be a pet, in practice, only a small number of species of mammals, especially dogs and cats, and other small animals, such as birds, are practical for several reasons. Fish have joined them more recently. Aside from the obvious, such as large animals not being able to fit inside small dwellings, which species are suited for being pets is less easy to understand.