DNS delegation of vn-yahoo.net updated: May 19, 2013 8:07:25 PM
Delegation
step
query
auth
servers
1
vn-yahoo.net.
.
(f,b,k,c,i,l,d,a,e,j,h,g,m).root-servers.net.
2
vn-yahoo.net.
net.
(j,k,c,d,g,i,m,l,a,f,h,e,b).gtld-servers.net.
3
vn-yahoo.net.
vn-yahoo.net.
(ns5,ns3,ns1,ns7,ns2).yahoo.com.
We pick f.root-servers.net, one of the 13 root servers (1), and ask it about vn-yahoo.net and learn that net is delegated to 13 name servers (2), so we ask j.gtld-servers.net where we learn that vn-yahoo.net is delegated to five name servers, including ns5.yahoo.com (3), so we ask that one and get the following answer:
Vn-yahoo.net is a domain controlled by five domain name servers at yahoo.com. All five of them are on different IP networks. Incoming mail for vn-yahoo.net is handled by one mail server at .. We are missing the IP:s of one server: .. Vn-yahoo.net has two IP numbers (68.180.206.184, 98.139.102.145). Both are on different IP networks.
The five name servers ns1, ns2, ns3, ns4 and ns5.yahoo.com together
Three quarter of the more than hundred domains that use name server group 1 point to IP group 1 (example: dlsyahoo.com, emailyahoomail.com and findchatingyahoo.com ). Worth noting is that most of the host names that point to IP group 1 use name server group 1.
