3 ms·
In the 90s Many questionable ISPs would ignore TTL values and thus you would be left with a situation where even with a reduced TTL for a maintenance window, yo
by threeio 5y ago
In the 90s Many questionable ISPs would ignore TTL values and thus you would be left with a situation where even with a reduced TTL for a maintenance window, you would still be stuck waiting for DNS caches to expire remotely.
Sure some places would take a little time for zone transfers within their internal NS servers, but primarily your delay was always the remote cache and TTL adherence