DNS delegation of wg1.b.yahoo.com updated: May 19, 2013 3:14:33 AM
Delegation
step
query
auth
servers
1
wg1.b.yahoo.com.
.
(f,c,m,e,d,k,g,a,l,j,h,b,i).root-servers.net.
2
wg1.b.yahoo.com.
com.
(e,b,a,d,i,k,c,f,h,g,j,m,l).gtld-servers.net.
3
wg1.b.yahoo.com.
yahoo.com.
(ns5,ns1,ns4,ns3,ns2).yahoo.com.
4
wg1.b.yahoo.com.
wg1.b.yahoo.com.
(yf6,yf4,yf8,yf3,yf2,yf1,yf5,yf7).yahoo.com.
We pick f.root-servers.net, one of the 13 root servers (1), and ask it about wg1.b.yahoo.com and learn that com is delegated to 13 name servers (2), so we ask e.gtld-servers.net where we learn that yahoo.com is delegated to five name servers, including ns5.yahoo.com (3), so we ask that one and learn that wg1.b.yahoo.com is delegated to eight name servers (4), so we ask yf6.yahoo.com and get the following answer:
Wg1.b.yahoo.com is a domain controlled by eight domain name servers at yahoo.com. Two domain name servers have the same IP number. All seven of them are on different IP networks.