DNS delegation of m.blogger.com updated: Jun 18, 2013 11:19:31 PM
Delegation
step
query
auth
servers
1
m.blogger.com.
.
(a,i,d,k,b,h,e,j,f,m,c,l,g).root-servers.net.
2
m.blogger.com.
com.
(f,h,g,m,j,d,a,i,e,c,b,l,k).gtld-servers.net.
3
m.blogger.com.
blogger.com.
(ns3,ns4,ns2,ns1).google.com.
4
go.blogger.com.
blogger.com.
(ns1,ns4,ns3,ns2).google.com.
5
blogger.l.google.com.
com.
(b,d,j,m,i,c,g,h,a,f,e,k,l).gtld-servers.net.
6
blogger.l.google.com.
google.com.
(ns4,ns2,ns1,ns3).google.com.
We pick a.root-servers.net, one of the 13 root servers (1), and ask it about m.blogger.com and learn that com is delegated to 13 name servers (2), so we ask f.gtld-servers.net where we learn that blogger.com is delegated to four name servers, including ns3.google.com (3), so we ask that one where we see a CNAME from m.blogger.com to go.blogger.com, so we have to start all over again. We already know that ns1.google.com is authoritative for blogger.com (4) and ask it about go.blogger.com and see a second CNAME from go.blogger.com to blogger.l.google.com. We start over for the third time and we already know that b.gtld-servers.net is authoritative for com (5) and ask it about blogger.l.google.com and learn that google.com is delegated to four name servers (6), so we ask ns4.google.com and get the following answer:
