They mean it's authoritative DNS, not a resolver. The two are completely different services. Authoritative DNS is the side that serves the records for your website, resolver is the part that follows the tree of authoritative servers on behalf of the client.
Pause frames are wild. I have a cheap Legion Go dock and if I leave it with power/Ethernet connected and no legion in the dock, it brings down my whole network after about 30min or so.
Probably depends on where the plane is coming from. Source: me who just returned from Europe last week, no spraying. And have traveled internationally several times in the last few years and also no spraying.
I was interested in this because it happened the last time I returned to NZ, but I hadn't seen it before. There are several approved methods and it depends on the airline. The method that doesn't involve spraying with you onboard is more expensive so tends to be used by budget airlines, and also airlines who might rotate their planes and crew around routes more often because it is a treatment that lasts for weeks.