When you have a number of domain names with different extensions and you want all of them to open the same Internet site, you could have the site under one of them and redirect all the rest. There are various methods to redirect one Internet domain name to another, including the so-called domain parking. When your hosting plan permits it, though, it shall be better if you host all the domains and set up a URL redirect, not a domain redirect. The main difference between the two is that while a domain is hosted, you could still have content for it, create subdomains, e mail addresses, etc., while with a parked domain you can't do any of those things. For example, if you are building localized sites under various country-code Internet domain names, you'll be able to work on them, but at the same time, visitors shall be redirected to the primary site.