> > it in their products or services.  Peter Koch did provide an interesting 
> > data point that warrants further investigation (20-35% of queries having DO 
> > bit on seems a bit high to me) and someone else responded privately that 
> 
> I think Peter's data point sure warrants further investigation, yes.

>From my own limited investigations (less than 10 servers, but millions
of DNS queries thus hopefully somewhat statistically significant):

  Authoritative servers: 35 - 45%
  Recursive servers:     In the noise (less than 0.5%)

which seems to indicate that there are quite a few recursive servers
out there that set the DO bit when querying authoritative servers.

One of the authoritative servers measured is a ccTLD server for .no.

Steinar Haug, Nethelp consulting, [EMAIL PROTECTED]
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