Reason for Limited number of Root DNS Servers

[Evan Hunt]

On Fri, Nov 11, 2011 at 11:08:31AM +0530, Gaurav Kansal wrote:
> As root DNS are running in anycast so number is not an issue at all. But I
> don't understand where exactly is this limitation exists???

Prior to EDNS(0), DNS packets transmitted over UDP couldn't be more
than 512 bytes in length.  More than 13, and the packet would have
been too large.

-- 
Evan Hunt -- each at isc.org
Internet Systems Consortium, Inc.