Domain Redirection & Etcetera

I've found that terms related to domain redirection and masking are confusing, so I thought I'd make some examples of what each term actually means, using two example domains: example.com and example.net. Assume the actual content is hosted at example.com.

This is the simplest one to understand. If example.net is set up to redirect (or forward) to example.com, when you type example.net into your browser it brings you to example.com instead.

URL typed into browser:	example.net
URL shown in address bar:	example.com
Displayed content is from:	example.com

This is the same thing as redirection except that you won't know you've been redirected since the URL shown in the address bar doesn't change. So if you typed in example.net, the content from example.com will be displayed, but it would appear to be coming from example.net (the mask/alias).

URL typed into browser:	example.net
URL shown in address bar:	example.net
Displayed content is from:	example.com

I can't think why you'd use this; it seems like it would just screw up your search engine ratings since it wouldn't know that both addresses are actually the same site.

Like a domain alias but with a subdomain. Usually, www.example.com would be an alias for example.com.

Unfortunately, my hosting provider has it set up so any subdomain, like anything.dragonzreef.com, acts as an alias for dragonzreef.com (with exception to subdomains I've actually created).