Answer:
You can use the IP address of the computer that is hosting the website (i.e. http://192.168.1.5/), or for Windows, you can usually use the computer's "host name", such as http://www-server/. Finally, if you are running a domain (i.e. you have Windows 200x Server installed), you can use the FQDN of the server, such as (http://www-server.intranet.local/). Be sure the firewall on the computer you are hosting the service on allows incoming connections for port 80, or port 443 for SSL/TLS connections.