I> Is "split horizon DNS" an industry-accepted term, or just
I> the invention of one individual?
Is Google not working ?
I don't know who invented the term "split horizon DNS", but
one of the earliest users, according to Google Groups at
least, was Paul Vixie, back in 1994. It's been used a fair
amount during the intervening nine years.
There are earlier uses of the term "split horizon" relating
to IP routing and not DNS that go back even further to 1988,
and I suspect that the term simply carried over from the one
to the other.
Another possibility (which I don't suspect) is that it is
indeed the invention of one individual, and that that
individual is Paul Vixie.
The original etymology of "split horizon" apparently stems
from the world of sextants. (Ironically, the analogy from
"split horizon update" to the world of sextants is rather
more contorted than the analogy of "split horizon DNS" is.)
"Split brain DNS" is a newer term (first occurring some
years after Paul Vixie first used "split horizon DNS") and
one less often used according to Google Groups. The
surgical procedure to which it alludes is somewhat drastic
and definitely ugly, and I suspect that it's used mainly by
those who didn't understand "split horizon DNS" straightaway
when they first saw it because they've never encountered a