5
For now there is one internet and one world wide web. The www, ww2, www2, etc. etc. has no meaning except it is a name. Don't confuse sub-domains as mentioned on a web host with a
http://www.yourdomain.com, they are the same thing. Where you point those names can be different or the same.
So if you wanted to have ww1, www1, www2, jokes, anything, you just need to create it in DNS and point the IP where you wish. If you wanted to have all the variations point to the same website the usual method is a CNAME entry.
I.E.:
yourdomain.com a 192.168.1.1
http://www.yourdomain.com CNAME yourdomain.com
ww2.yourdomain.com CNAME yourdomain.com
This makes all of them point to the same server. I don't know Cpanel but I think the equivalent is a "parked domain". If you can't do that in Cpanel for variations in name like ww2 or if creating a "sub-domain" as they call it can't point to the same server (vs a sub directory) then that is a limitation of Cpanel or the ISP. Many sites will have a variety of names and domains all pointing to the same server. But the path and protocol is the same. "Smoke and mirrors".