Am 16.11.20 um 00:36 schrieb Samuel Sieb:
DoT becomes efficient when we can reuse the established TCP/TLS connection
for multiple lookups. But if we'd switch servers all the time, then of
course there's no reuse of TCP/TLS connections possible.

Same thing here.  Would it be a problem to keep a connection open for each server?

I'm pretty sure, DNS Cache owners won't keep your connection open forever due to available sockets on a system.

So randomization may have it's limits, if used with DoT or DoH.  No limits for UDP transports here.

best regards,
Marius