DNS delegation of stu.kashanu.ac.ir updated: May 22, 2013 12:08:56 AM
Delegation
step
query
auth
servers
1
stu.kashanu.ac.ir.
.
(d,g,i,f,j,m,b,l,k,a,h,c,e).root-servers.net.
2
stu.kashanu.ac.ir.
ir.
ns5.univie.ac.at. a.nic.ir. ns.irnic.ir.
3
stu.kashanu.ac.ir.
kashanu.ac.ir.
(ns2,ns1).kashanu.ac.ir.
4
ns2.kashanu.ac.ir.
kashanu.ac.ir.
(ns2,ns1).kashanu.ac.ir.
We pick d.root-servers.net, one of the 13 root servers (1), and ask it about stu.kashanu.ac.ir and learn that ir is delegated to three name servers (2), so we ask ns5.univie.ac.at where we learn that kashanu.ac.ir is delegated to two name servers, including ns2.kashanu.ac.ir (3), so we ask that one where we see a CNAME from stu.kashanu.ac.ir to ns2.kashanu.ac.ir, so we have to start all over again. We already know that ns2.kashanu.ac.ir is authoritative for kashanu.ac.ir (4) and ask it about ns2.kashanu.ac.ir and get the following answer: