DNS delegation of id.ucsb.edu updated: May 25, 2013 10:15:13 PM
Delegation
step
query
auth
servers
1
id.ucsb.edu.
.
(j,m,d,c,f,h,g,b,e,l,i,a,k).root-servers.net.
2
id.ucsb.edu.
edu.
(g,c,d,f,a,l).edu-servers.net.
3
id.ucsb.edu.
ucsb.edu.
bru-ns2.brown.edu. ns1.ucsb.edu. ns2.ucsb.edu.
We pick j.root-servers.net, one of the 13 root servers (1), and ask it about id.ucsb.edu and learn that edu is delegated to six name servers (2), so we ask g.edu-servers.net where we learn that ucsb.edu is delegated to three name servers, including bru-ns2.brown.edu (3), so we ask that one and get the following answer:
Id.ucsb.edu is a domain controlled by three domain name servers at ucsb.edu having a total of five IP numbers. Some of them are on the same IP network. Incoming mail for id.ucsb.edu is handled by one mail server also at ucsb.edu. Id.ucsb.edu has one IP number (128.111.138.13), but the reverse is www.id.ucsb.edu.