[dns-operations] The (very) uneven distribution of DNS root servers on the Internet

[Randy Bush]

>> One could logically assume that if a caching server is within a
>> certain radius of a node geographically, they are likely able to
>> route to it (country boundaries/geography may change this, but I did
>> say roughly).
> 
> This assumption is what leads folks to do what Pingdom has done.  It
> is a common mistake to assume network topology matches geo-political
> topology.  In many case, regulatory regimes, business rules,
> etc. result in the exact opposite.

my favorite is that some root server operators intentionally limit bgp
announcement scope, so it does not even follow net topology, let alone
geo.

randy