[LINK] Microsoft is no more!!

[Scott Howard]

On Thu, Jan 25, 2001 at 09:54:42AM +1100, DaZZa wrote:
> On Wed, 24 Jan 2001, Scott Howard wrote:
> 
> > Authoritative answers can be found from:
> > DNS7.CP.MSFT.NET        internet address = 207.46.138.21
> > DNS6.CP.MSFT.NET        internet address = 207.46.138.20
> > DNS4.CP.MSFT.NET        internet address = 207.46.138.11
> > DNS5.CP.MSFT.NET        internet address = 207.46.138.12
> 
> These could conceivable be on different segments {bits of wire} given
> appropriate subnetting of the class C address range.

Which is exactly what I put "basically" in my original message.
Yes, it is possible to split subnet at less than a C class boundry
and in fact Connect.om.Au do exactly this with two of their
name servers - 192.189.54.17 is in Melbourne, and 192.189.54.33
is in Sydney.

The problem is that once the routes get out onto the internet,
anything less than a /24 (ie, class C) will generally be either
dropped or aggregated - leaving your two servers on the same
"network".
eg, the path to Connect.com.au's Sydney nameserver from Telstra 
Sydney goes via Melbourne, same as the Melbourne one.

I don't know if MS have these hosts in different location (either
physically or network-wise, or both), but the point still remains
that having all of your name servers within a single class C is
a fairly stupid thing to do...

  Scott.