If you have several domain names with different extensions and you would like all of them to open the same site, you can have the Internet site under one of them and redirect all the rest. There are several ways to redirect one domain name to another, among them the so-called domain parking. If your web hosting package deal permits it, though, it'll be better if you host all the domains and create a URL redirect, not a domain redirect. The primary difference between the two is that while a domain is hosted, you can still have content for it, create subdomains, email addresses, etc., while with a parked domain you can't do any of these things. As an illustration, if you're building localized Internet sites under various country-code Internet domain names, you shall be able to work on them, but in the meantime, people shall be forwarded to the main site.