In case you have a few domains with different extensions and you want all of them to open precisely the same Internet site, you could have the website under one of them and redirect all the rest. There are various approaches to redirect one Internet domain name to another, such as the so-called domain parking. If your web hosting package permits it, though, it will be better if you host all of the domains and set up a URL redirect, not a domain redirect. The real difference between the two is that while a domain name is hosted, you could 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 example, if you're building localized websites under various country-code domain names, you shall be able to work on them, but in the meantime, people shall be forwarded to the main site.