When you have a lot of domain names with different extensions and you need all of them to open the very same Internet site, you may have the Internet site under one of them and redirect the rest. There are various methods to redirect one domain name to another, such as the so-called domain parking. When your website hosting package permits it, though, it shall 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 name is hosted, you may still have content for it, create subdomains, email addresses, and many others., while with a parked domain it's not possible to do any of those things. For example, if you're building localized Internet sites under several country-code domains, you will be able to work on them, but meanwhile, people shall be forwarded to the main site.