DNS delegation of a03.yahoodns.net updated: May 23, 2013 4:13:42 PM
Delegation
step
query
auth
servers
1
a03.yahoodns.net.
.
(d,f,h,c,g,e,j,b,l,m,k,a,i).root-servers.net.
2
a03.yahoodns.net.
net.
(l,j,m,f,e,i,a,k,d,c,g,b,h).gtld-servers.net.
3
a03.yahoodns.net.
yahoodns.net.
(ns3,ns2,ns5,ns1,ns4).yahoo.com.
4
a03.yahoodns.net.
a03.yahoodns.net.
(yf2,yf1).yahoo.com.
We pick d.root-servers.net, one of the 13 root servers (1), and ask it about a03.yahoodns.net and learn that net is delegated to 13 name servers (2), so we ask l.gtld-servers.net where we learn that yahoodns.net is delegated to five name servers, including ns3.yahoo.com (3), so we ask that one and learn that a03.yahoodns.net is delegated to two name servers (4), so we ask yf2.yahoo.com and get the following answer: