I am getting ready to extend a Web Application to another IIS Web Site so that I can use different forms of authentication between internal and external users.
When I do so, I have the choice of which Zone to place the web site in. Thus far, for any "Zone" field, I have just used "Default", but of course, when extending the web application, I have to choose a different Zone.
I have not been able to find any documentation on the differences between the five zones of "Default", "Intranet", "Internet", "Custom", and "Extranet".
In particular, I have trouble seeing what the difference between "Internet" and "Extranet" would be for a public facing URL.
What are the differences between these Zones?