In case you have a lot of domains with different extensions and you would like all of them to open exactly the same site, you can have the site under one of them and redirect the others. There are various approaches to forward one domain name to another, including the so-called domain parking. If your website hosting plan permits it, though, it will be better if you host each 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 may still have content for it, set up subdomains, e-mail addresses, and many others., while with a parked domain you cannot do any of these things. As an example, if you're building localized sites under different country-code domain names, you shall be able to work on them, but meanwhile, visitors will be redirected to the primary Internet site.