DNS delegation of c.dns.jp updated: Jun 20, 2013 7:03:11 AM
Delegation
step
query
auth
servers
1
c.dns.jp.
.
(f,g,c,h,a,j,m,d,i,l,e,b,k).root-servers.net.
2
c.dns.jp.
jp.
(f,g,a,d,e,c,b).dns.jp.
We pick f.root-servers.net, one of the 13 root servers (1), and ask it about c.dns.jp and learn that jp is delegated to seven name servers (2), so we ask f.dns.jp and get the following answer:
There are three domains that use the name server c.dns.jp.
All of those use the seven name servers a, b, c, d, e, f and g.dns.jp together, hereafter referred to as "name server group 1", (example: .jp and jp ).
One of them use the two mail servers mx11 and mx12.jprs.co.jp together, hereafter referred to as "mail server group 1".
The seven name servers a, b, c, d, e, f and g.dns.jp together
One of the three domains that use name server group 1 use mail server group 1.