Rob Austein writes:
> This has been suggested before, and it's an appealing idea, but it
> assumes that resolvers will try every address of every listed server.

No. No widely deployed program tries _every_ address; there are always
limits. But if you try the 4x4 strategy (which still has quite a bit of
room in the UDP packet) then you'll see that the load is spread quite
evenly across 16 servers. The other strategy can't do better than 13.

---D. J. Bernstein, Associate Professor, Department of Mathematics,
Statistics, and Computer Science, University of Illinois at Chicago
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