In case you have a lot of domain names with different extensions and you need all of them to open the exact same Internet site, you could have the Internet site under one of them and redirect the rest. There are several ways to forward one domain name to another, such as the so-called domain parking. When your web hosting package deal permits it, though, it will be better if you host all of the domains and create a URL redirect, not a domain redirect. The real difference between the two is that while a domain address is hosted, you can still have content for it, set up subdomains, email addresses, etc., while with a parked domain you can't do any of those things. As an example, if you're building localized sites under different country-code domains, you'll be able to work on them, but in the meantime, people shall be forwarded to the main Internet site.