On Sun, Apr 01, 2012 at 11:23:31PM +0800, Che-Hoo CHENG <chcheng@ieee.org> wrote a message of 9 lines which said:

http://dnsmon.ripe.net/dns-servmon/server/plot?server=b.root-servers.net;typ...

There were quite a few unanswered queries from around 06:15 to around 09:15 UTC on Mar 31.

B is often the weakest link of the 13. I have no idea whether it was attacked or not but perturbations are common. Most of the time, noone watches dnsmon so they go unnoticed but, on March 31st, every small glitch was spotted...