DNS delegation of a05.yahoodns.net updated: May 18, 2013 10:19:45 PM
Delegation
step
query
auth
servers
1
a05.yahoodns.net.
.
(f,g,h,b,l,e,a,m,j,d,c,k,i).root-servers.net.
2
a05.yahoodns.net.
net.
(e,a,m,i,l,c,f,b,j,h,k,g,d).gtld-servers.net.
3
a05.yahoodns.net.
yahoodns.net.
(ns5,ns1,ns4,ns3,ns2).yahoo.com.
4
a05.yahoodns.net.
a05.yahoodns.net.
(yf2,yf1).yahoo.com.
We pick f.root-servers.net, one of the 13 root servers (1), and ask it about a05.yahoodns.net and learn that net is delegated to 13 name servers (2), so we ask e.gtld-servers.net where we learn that yahoodns.net is delegated to five name servers, including ns5.yahoo.com (3), so we ask that one and learn that a05.yahoodns.net is delegated to two name servers (4), so we ask yf2.yahoo.com and get the following answer: