Thanks for your reply.
After reading both your response and the BIND Reference Manual mentioned above, it appears that caching nameservers are only useful for increasing performance and distributing the load on authoritative nameservers. As such, they don't store A records as I originally assumed. If I am correct, it also doesn't appear that caching nameservers have to reference authoritative nameservers within the zone as they can just begin queries directly through the TLD nameservers. At least this is what I appear to have found out when tinkering with a box I will be using for DNS here.
So, I will study further about what you mention as far as using a domain not officially registered since I will need an authoritative nameserver to store local A records for the machines I have at home.
So thanks for giving direction. I will likely be back with more questions in a few days.
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