DNS delegation of youtube.cf updated: May 22, 2013 6:53:54 AM
Delegation
step
query
auth
servers
1
youtube.cf.
.
(l,b,f,j,c,g,d,e,h,i,a,m,k).root-servers.net.
2
youtube.cf.
cf.
(a,d,b,c).ns.cf.
3
youtube.cf.
youtube.cf.
(ns4,ns1,ns3,ns2).google.com.
We pick l.root-servers.net, one of the 13 root servers (1), and ask it about youtube.cf and learn that cf is delegated to four name servers (2), so we ask a.ns.cf where we learn that youtube.cf is delegated to four name servers, including ns4.google.com (3), so we ask that one and get the following answer: