John Levine wrote:
The overall sense I got was that nobody liked zone cuts, and although
a tree walk is a bad solution, unless you believe that current
wildcards handle prefixed names, which they don't unless you use
a rather exotic definition of "handle", they are the least bad option.
What I've never been clear on is whether zone cuts can't
be used as an *optimization* in many cases such that normally
you'd be doing a max of two lookups, but in some pathological
cases you'd have to do the tree walk. From what I've seen looking
at the authority record seems to often be what you want for
deeply nested subdomains. It's been a while since I've had
this problem swapped in though.
Mike