When you have a few domain names with different extensions and you need all of them to open exactly the same Internet site, you can have the Internet site under one of them and forward the rest. There are various approaches to redirect one domain name to another, including the so-called domain parking. If your web hosting package deal permits it, though, it will be better if you host all the domains and set up a URL redirect, not a domain redirect. The real difference between the two is that while a domain address is hosted, you may still have content for it, set up subdomains, e-mail addresses, and so forth., while with a parked domain it's not possible to do any of these things. As an illustration, if you are building localized websites under various country-code domains, you shall be able to work on them, but meanwhile, people will be redirected to the primary site.