DNS delegation of yahoo.travel updated: Jun 19, 2013 5:25:47 PM
Delegation
step
query
auth
servers
1
yahoo.travel.
.
(h,l,e,k,i,c,b,g,m,j,f,a,d).root-servers.net.
2
yahoo.travel.
travel.
(f,d,b,e,c,a).gtld.travel.
3
yahoo.travel.
yahoo.travel.
(ns2,ns5,ns1,ns3).yahoo.com.
We pick h.root-servers.net, one of the 13 root servers (1), and ask it about yahoo.travel and learn that travel is delegated to six name servers (2), so we ask f.gtld.travel where we learn that yahoo.travel is delegated to four name servers, including ns2.yahoo.com (3), so we ask that one and get the following answer:
Yahoo.travel is a domain controlled by four domain name servers at yahoo.com. All four of them are on different IP networks. Incoming mail for yahoo.travel is handled by one mail server at .. We are missing the IP:s of one server: .. Yahoo.travel has two IP numbers (68.180.206.184, 98.139.102.145). Both are on different IP networks.