DNS delegation of ns3.bizb.com updated: Jun 20, 2013 10:18:05 AM
Delegation
step
query
auth
servers
1
ns3.bizb.com.
.
(j,l,f,a,h,d,c,e,i,m,g,b,k).root-servers.net.
2
ns3.bizb.com.
com.
(b,m,h,e,k,j,d,g,a,l,i,f,c).gtld-servers.net.
3
ns3.bizb.com.
bizb.com.
(ns3,ns4).bizb.com.
We pick j.root-servers.net, one of the 13 root servers (1), and ask it about ns3.bizb.com and learn that com is delegated to 13 name servers (2), so we ask b.gtld-servers.net where we learn that bizb.com is delegated to two name servers, including ns3.bizb.com (3), so we ask that one and get the following answer:
Eight of them use the two name servers ns3 and ns4.bizb.com together (but neither ns1 nor ns2.bizb.com ), hereafter referred to as "name server group 2", (example: ns4.bizb.com ).
Three of them point only to the IP number 74.82.161.222.
Three of them point only to the IP number 74.82.161.221.
The name server ns1.bizb.com
There are 15 domains that use the name server ns1.bizb.com.
All of those use name server group 1.
Two of them point only to the IP number 74.82.161.222.
Two of them point only to the IP number 74.82.161.216.
Two of them point only to the IP number 74.82.161.221.
The name server ns3.bizb.com
There are about twenty domains that use the name server ns3.bizb.com.
Half of those use name server group 1.
Eight of them use name server group 2.
Three of them point only to the IP number 74.82.161.216.
Three of them point only to the IP number 74.82.161.221.
The IP number 74.82.161.221
There are four host names that point to the IP number 74.82.161.221.
All of those point only to that ip number.
Two of them use name server group 1.
The IP number 74.82.161.222
There are four host names that point to the IP number 74.82.161.222.
The four name servers ns1, ns2, ns3 and ns4.bizb.com together
There are 15 domains that use name server group 1.
Two of those point only to the IP number 74.82.161.221. Worth noting is that two of the host names that point only to the IP number 74.82.161.221 use name server group 1.
Two of them point only to the IP number 74.82.161.216.
Two of them point only to the IP number 74.82.161.222. Worth noting is that two of the host names that point only to the IP number 74.82.161.222 use name server group 1.
The IP number 74.82.161.222 only
Two of the four host names that point only to the IP number 74.82.161.222 use name server group 1. Worth noting is that two of the domains that use name server group 1 point only to the IP number 74.82.161.222.
The IP number 74.82.161.221 only
Two of the four host names that point only to the IP number 74.82.161.221 use name server group 1. Worth noting is that two of the domains that use name server group 1 point only to the IP number 74.82.161.221.
