DNS delegation of yahoo1.com updated: May 25, 2013 3:33:53 AM
Delegation
step
query
auth
servers
1
yahoo1.com.
.
(m,c,k,j,f,a,b,l,e,d,i,h,g).root-servers.net.
2
yahoo1.com.
com.
(j,f,g,l,e,a,b,m,d,i,c,k,h).gtld-servers.net.
3
yahoo1.com.
yahoo1.com.
(ns1,ns2).yahoo.com.
We pick m.root-servers.net, one of the 13 root servers (1), and ask it about yahoo1.com and learn that com is delegated to 13 name servers (2), so we ask j.gtld-servers.net where we learn that yahoo1.com is delegated to two name servers, including ns1.yahoo.com (3), so we ask that one and get the following answer:
Yahoo1.com is a domain controlled by five domain name servers at yahoo.com. All five of them are on different IP networks. Incoming mail for yahoo1.com is handled by one mail server at .. We are missing the IP:s of one server: .. Yahoo1.com 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: cgi2-yahoo.com, dlsyahoo.com and emailyahoomail.com ). Worth noting is that most of the host names that point to IP group 1 use name server group 1.
