DNS delegation of www.uolinc.com updated: Jun 19, 2013 1:07:41 PM
Delegation
step
query
auth
servers
1
www.uolinc.com.
.
(d,e,h,a,l,m,k,j,g,b,c,f,i).root-servers.net.
2
www.uolinc.com.
com.
(c,d,i,h,a,m,b,e,k,j,l,g,f).gtld-servers.net.
3
www.uolinc.com.
uolinc.com.
(eliot,borges).uol.com.br.
4
www.uol.com.br.
.
(l,e,i,k,j,m,g,c,f,d,a,b,h).root-servers.net.
5
www.uol.com.br.
br.
(a,c,d,b,e,f).dns.br.
6
www.uol.com.br.
uol.com.br.
(borges,eliot,charles).uol.com.br.
We pick d.root-servers.net, one of the 13 root servers (1), and ask it about www.uolinc.com and learn that com is delegated to 13 name servers (2), so we ask c.gtld-servers.net where we learn that uolinc.com is delegated to two name servers, including eliot.uol.com.br (3), so we ask that one where we see a CNAME from www.uolinc.com to www.uol.com.br, so we have to start all over again. We pick l.root-servers.net, one of the 13 root servers (4), and ask it about www.uol.com.br and learn that br is delegated to six name servers (5), so we ask a.dns.br where we learn that uol.com.br is delegated to three name servers, including borges.uol.com.br (6), so we ask that one and get the following answer: