DNS delegation of dvd4arab.com updated: May 21, 2013 9:49:01 PM
Delegation
step
query
auth
servers
1
dvd4arab.com.
.
(b,e,f,h,c,l,k,d,j,g,m,i,a).root-servers.net.
2
dvd4arab.com.
com.
(a,e,i,b,k,d,f,l,j,c,g,m,h).gtld-servers.net.
3
dvd4arab.com.
dvd4arab.com.
(ns2,ns3,ns1,ns4,ns5).yahoo.com.
We pick b.root-servers.net, one of the 13 root servers (1), and ask it about dvd4arab.com and learn that com is delegated to 13 name servers (2), so we ask a.gtld-servers.net where we learn that dvd4arab.com is delegated to five name servers, including ns2.yahoo.com (3), so we ask that one and get the following answer:
The five name servers ns1, ns2, ns3, ns4 and ns5.yahoo.com together
Half of the several thousand of domains that use name server group 1 point to IP group 1 (example: yahoogilgans.com, yahoosafariyumyum.com and yahoovoicelaggerdownloads.com ). Worth noting is that three quarter of the host names that point to IP group 1 use name server group 1.