DNS delegation of ns1.umd.edu updated: Jun 20, 2013 12:43:49 PM
Delegation
step
query
auth
servers
1
ns1.umd.edu.
.
(g,c,h,f,l,b,a,k,i,m,d,e,j).root-servers.net.
2
ns1.umd.edu.
edu.
(l,a,c,g,d,f).edu-servers.net.
3
ns1.umd.edu.
umd.edu.
(ns2,noc,ns1).umd.edu.
We pick g.root-servers.net, one of the 13 root servers (1), and ask it about ns1.umd.edu and learn that edu is delegated to six name servers (2), so we ask l.edu-servers.net where we learn that umd.edu is delegated to three name servers, including ns2.umd.edu (3), so we ask that one and get the following answer:
There are three domains that only use the mail server nts.umd.edu.
One of those point only to the IP number 128.8.74.2. Worth noting is that one of the host names that point only to the IP number 128.8.74.2 use only the mail server nts.umd.edu.
One of them point only to the IP number 128.8.76.2.
One of them point only to the IP number 128.8.10.6.
The IP number 128.8.5.5 only
One of the two host names that point only to the IP number 128.8.5.5 use mail server group 1.
The IP number 128.8.74.2 only
One of the two host names that point only to the IP number 128.8.74.2 use only the mail server nts.umd.edu. Worth noting is that one of the domains that only use the mail server nts.umd.edu point only to the IP number 128.8.74.2.