Different SSL for with/without 'www'?

I got a FreeSSL trial cert. The cert is for 'abc.com'

It works fine for URL https://abc.com,

BUT when I visit https://www.abc.com, the following warning popups up.

The name on the security cert is invalid or does not match the name of the site.
I would like to know if this is normal?

Also, if I have a parked-domain "domain2.com" parked to "domain1.com", can I get a cert for "subdomain.domain2.com"?

Thanks a lot.

 

 

 

 

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