DNS delegation of yahoo.com.bd updated: May 19, 2013 6:59:11 PM
Delegation
step
query
auth
servers
1
yahoo.com.bd.
.
(k,c,b,a,e,l,m,j,i,h,g,d,f).root-servers.net.
2
yahoo.com.bd.
bd.
jamuna.btcl.net.bd. dns.bd. surma.btcl.net.bd.
3
yahoo.com.bd.
yahoo.com.bd.
(ns3,ns1,ns2).yahoo.com.
We pick k.root-servers.net, one of the 13 root servers (1), and ask it about yahoo.com.bd and learn that bd is delegated to three name servers (2), so we ask jamuna.btcl.net.bd where we learn that yahoo.com.bd is delegated to three name servers, including ns3.yahoo.com (3), so we ask that one and get the following answer:
Yahoo.com.bd is a domain controlled by five domain name servers at yahoo.com. All five of them are on different IP networks. Incoming mail for yahoo.com.bd is handled by one mail server at .. We are missing the IP:s of one server: .. Yahoo.com.bd 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 about ninety domains that use name server group 1 point to IP group 1 (example: dlsyahoo.com, emailyahoomail.com and findchatingyahoo.com ). Worth noting is that nine percent of the host names that point to IP group 1 use name server group 1.
