In case you have a lot of domains with different extensions and you want all of them to open the same Internet site, you could have the Internet site under one of them and redirect the others. There are various approaches to forward one domain name to another, like the so-called domain parking. If your hosting package permits it, though, it shall be better if you host all of the domains and set up a URL redirect, not a domain redirect. The difference between the two is that while a domain address is hosted, you could still have content for it, set up subdomains, email addresses, and so forth., while with a parked domain you are unable to do any of these things. For example, if you are building localized Internet sites under various country-code domain names, you shall be able to work on them, but meanwhile, visitors will be forwarded to the primary site.