DNS delegation of david-irvine.com updated: May 19, 2013 4:03:51 PM
Delegation
step
query
auth
servers
1
david-irvine.com.
.
(m,l,h,c,f,i,a,b,g,k,j,d,e).root-servers.net.
2
david-irvine.com.
com.
(h,d,c,a,l,b,j,e,m,k,i,f,g).gtld-servers.net.
3
david-irvine.com.
david-irvine.com.
dns1.name-s.net. dns2.name-s.net. dns3.mtgsy.com.
4
aspmx2.googlemail.com.
com.
(d,m,f,k,j,l,g,a,c,b,i,e,h).gtld-servers.net.
5
aspmx2.googlemail.com.
googlemail.com.
(ns1,ns2,ns3,ns4).google.com.
We pick m.root-servers.net, one of the 13 root servers (1), and ask it about david-irvine.com and learn that com is delegated to 13 name servers (2), so we ask h.gtld-servers.net where we learn that david-irvine.com is delegated to three name servers, including dns1.name-s.net (3), so we ask that one where we see a CNAME from david-irvine.com to aspmx2.googlemail.com, so we have to start all over again. We already know that d.gtld-servers.net is authoritative for com (4) and ask it about aspmx2.googlemail.com and learn that googlemail.com is delegated to four name servers (5), so we ask ns1.google.com and get the following answer:
