DNS delegation of yahoo.kz updated: Jun 19, 2013 4:35:05 AM
Delegation
step
query
auth
servers
1
yahoo.kz.
.
(a,h,k,j,i,d,g,m,l,b,e,f,c).root-servers.net.
2
yahoo.kz.
kz.
kz.cctld.authdns.ripe.net. ns.nic.kz.
3
yahoo.kz.
yahoo.kz.
(ns5,ns1).yahoo.com.
We pick a.root-servers.net, one of the 13 root servers (1), and ask it about yahoo.kz and learn that kz is delegated to two name servers (2), so we ask kz.cctld.authdns.ripe.net where we learn that yahoo.kz is delegated to two name servers, including ns5.yahoo.com (3), so we ask that one and get the following answer:
The five name servers ns1, ns2, ns3, ns4 and ns5.yahoo.com together
There are several thousand of domains that use name server group 1.
Three quarter of those use only the mail server . (example: yahoomesseger.com, ymusicengine.net and user-mailyahoo.com ). Worth noting is that three percent of the domains that only use the mail server . use name server group 1.