Eliot Lear wrote:
Forgive me, but you didn't answer my question.
I honestly think I did.
How do I tell my credit
card company's billing system which harris.com to use?
You tell them -- you have a previous relationship (when you
credit was approved). As I exemplified, you tell them to use
the harris.com that is resolved from your root -- an IP number.
Richard or Stef can tell you how this works for them.
What keeps my
data entry from becoming ambiguous over time?
Your actions, just like today -- what happens if you drop
your domain name today?
Hope this helps.
Ed Gerck wrote:
How does my credit card company's billing system know which harris.com
to transmit my bill to? What unique attributes does it use to choose
between the two domains?
that's easy. Your credit card company has a previous relationship with
you and knows which harris.com to transmit to. Possibly, to the harris.com
defined at your root. In pretty much the same way, btw, that the credit
company can disambiguate between you and any other Eliot Lear.