RE: How common is lack of DNS server diversity?

[Roeland Meyer <rmeyer () mhsc com>]

> > More interestingly, how many root servers allow recursive lookup?
>
> a quick looping probe shows that none of them do, nor the gTLD servers
> (phew!) although L.ROOT-SERVERS.NET and H.GTLD-SERVERS.NET 
> are unreachable
> from my view. Preparing an accurate list of all TLD servers 
> glued in the
> root zone will take a little longer.

I was taking about root servers at ALL levels, not just the root.