In case you have a number of domain names with different extensions and you need all of them to open exactly the same website, you could have the website under one of them and redirect the others. There are a number of approaches to forward one Internet domain name to another, among them the so-called domain parking. When your 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 main difference between the two is that while a domain address is hosted, you may still have content for it, create subdomains, email addresses, and many others., while with a parked domain you cannot do any of those things. As an illustration, if you are building localized sites under several country-code Internet domain names, you will be able to work on them, but in the meantime, people shall be forwarded to the primary Internet site.