performance
Click on the red underlined text to get to the source
... reliability of that zone
as well as improve overall network performance and access
characteristics. Other considerations in server choice can
unexpectedly lower reliability ...
... there are simply multiple servers. All are treated equally at first
instance, even by the parent server that delegates the zone.
Resolvers often measure the performance of the various servers,
choose the "best", for some definition of best, and prefer that one
for most queries ...
... of a DNS packet, and causing that limit to be reached has more
serious performance implications. It is wise to stay well clear of
it. More servers also increase the likelihood that one server will
be misconfigured, or malfunction, without being detected.
...