If you have a number of domains with different extensions and you want all of them to open the exact same Internet site, you can have the Internet site under one of them and forward the rest. There are a number of approaches to redirect one domain to another, including the so-called domain parking. When your website hosting plan allows it, though, it'll 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 may still have content for it, set up subdomains, e-mail addresses, and so on., while with a parked domain you are unable to do any of those things. For instance, if you're building localized sites under different country-code domain names, you shall be able to work on them, but at the same time, people will be forwarded to the primary website.