How do I set up a double domain like domain2.mydomain.com and mydomain.com?

Posted by kdavis8 on Pro Webmasters See other posts from Pro Webmasters or by kdavis8
Published on 2012-06-21T13:29:14Z Indexed on 2012/06/21 21:24 UTC
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subdomain

I would like to set up a server similar to Google's. Their domain acts like a double domain, like you can use these URLS, "play.Google.com" or "apps.Google.com", to go to different sites.. For example, my domain would now be "my_domain.com" but i would like another one to be "domain2.my_domain.com". My question is,what is this officially called and how do i set it up? I'm not sure if you need two servers or just 1;

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