Multiple Domain names?

[mcomet]

Can one site be on multiple domain names? Some are company-specific name, and some are keyword-rich names.
If yes, do I submit them all to search engines?
will Search engines penalize my site for having more than 1 domain name? will search engines treat them as different sites? or do they see them as mirror-sites?

Please help.

Thanks so much.

[SeoMasta]

I'm gonna make it quick and simple according to the rules of SEO you cannot have the same content of a page on another page, each page has to be different with its content and the way it looks. but you can still do it, its at your own risk, remember its not cheating until your caught :)

good luck.

[eWhisper]

Are you talking about multiple domains for SEO or PPC purposes?

[mcomet]

SEO purposes