JM> AFAIK, a fully qualified domain name is like

JM> machine.domain.xxx

JM> but what about addresses like

JM> us.510.mail.yahoo.com??

JM> Is there any hierarchy to the names in this case?

JM> jm

---------------------------------------------

I would think that viewing mail.yahoo.com as machine.domain.xxx might
be flawed if you think of mail.yahoo.com as
subdomain.domain.top-level-domain it is (or so I think) easier to
comprehend that
subdomain.subdomain.domain.top-level-domain is not that different.
Now add to that picture that every subdomain could be an alias for another
domain or point to an IP address, which incase of the IP address is
meaning a real machine.

Did I misinterpret your question ?

Hexren

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