DNS delegation of bull.pf updated: May 19, 2013 7:22:46 PM
Delegation
step
query
auth
servers
1
bull.pf.
.
(g,c,e,f,m,h,k,b,l,d,i,j,a).root-servers.net.
2
bull.pf.
pf.
(ns2,ns1).mana.pf.
We pick g.root-servers.net, one of the 13 root servers (1), and ask it about bull.pf and learn that pf is delegated to two name servers (2), so we ask ns2.mana.pf and get the following answer:
Bull.pf is a domain controlled by two domain name servers at mana.pf. Both are on the same IP network. Incoming mail for bull.pf is handled by two mail servers at mana.pf and bull.pf. Both are on different IP networks.
Bull.pf uses the primary name server ns1.mana.pf, the two name servers ns1 and ns2.mana.pf together, hereafter referred to as "name server group 1", the primary mail server mail.bull.pf and the last resort mail server smtpq.mana.pf.
The two name servers ns1 and ns2.mana.pf together
There are several hundred of domains that use name server group 1.
Most of the several hundred of domains that use the primary name server ns1.mana.pf use name server group 1 (example: opt.pf, ird.pf and 225.3.202.in-addr.arpa ). Worth noting is that all of the domains that use name server group 1 use the primary name server ns1.mana.pf.
