DNS delegation of gl.s9a2.psmtp.com updated: May 22, 2013 9:22:56 AM
Delegation
step
query
auth
servers
1
gl.s9a2.psmtp.com.
.
(g,e,l,c,h,f,b,m,i,d,k,a,j).root-servers.net.
2
gl.s9a2.psmtp.com.
com.
(e,j,a,l,c,d,g,i,h,b,k,f,m).gtld-servers.net.
3
gl.s9a2.psmtp.com.
psmtp.com.
(ns4,ns1,ns3,ns2).google.com.
We pick g.root-servers.net, one of the 13 root servers (1), and ask it about gl.s9a2.psmtp.com and learn that com is delegated to 13 name servers (2), so we ask e.gtld-servers.net where we learn that psmtp.com is delegated to four name servers, including ns4.google.com (3), so we ask that one and get the following answer: