DNS delegation of britannica.com updated: May 23, 2013 4:27:47 PM
Delegation
step
query
auth
servers
1
britannica.com.
.
(m,g,c,h,j,a,d,b,f,l,e,i,k).root-servers.net.
2
britannica.com.
com.
(i,b,k,l,e,g,d,c,j,h,f,m,a).gtld-servers.net.
3
britannica.com.
britannica.com.
(ns1,ns3).eb.com.
We pick m.root-servers.net, one of the 13 root servers (1), and ask it about britannica.com and learn that com is delegated to 13 name servers (2), so we ask i.gtld-servers.net where we learn that britannica.com is delegated to two name servers, including ns1.eb.com (3), so we ask that one and get the following answer:
Six of them point to the IP number 208.185.238.124. Worth noting is that six of the host names that point to the IP number 208.185.238.124 use the mail server mail98.eb.com.
Six of them point to the IP number 64.124.231.124. Worth noting is that six of the host names that point to the IP number 64.124.231.124 use the mail server mail98.eb.com.
The three name servers ns1.eb.com, ns3.eb.com and ns1.telstra.net together
Four of the five domains that use the three name servers ns1.eb.com, ns3.eb.com and ns1.telstra.net together, hereafter referred to as "name server group 2", point only to the IP number 64.124.231.105.
The IP number 208.185.238.124
There are 13 host names that point to the IP number 208.185.238.124.
Six of them use the name server ns3.eb.com. Worth noting is that six of the domains that use the name server ns3.eb.com point to the IP number 208.185.238.124.
Six of them use the name server ns1.eb.com. Worth noting is that six of the domains that use the name server ns1.eb.com point to the IP number 208.185.238.124.
The IP number 64.124.231.124
There are 13 host names that point to the IP number 64.124.231.124.
Six of those use the mail server mail98.eb.com. Worth noting is that six of the domains that use the mail server mail98.eb.com point to the IP number 64.124.231.124.