DNS delegation of glb2.facebook.com updated: May 20, 2013 5:34:48 AM
Delegation
step
query
auth
servers
1
glb2.facebook.com.
.
(h,l,b,d,c,g,j,m,e,k,a,f,i).root-servers.net.
2
glb2.facebook.com.
com.
(h,d,a,b,g,k,l,i,f,j,c,e,m).gtld-servers.net.
3
glb2.facebook.com.
facebook.com.
(a,b).ns.facebook.com.
We pick h.root-servers.net, one of the 13 root servers (1), and ask it about glb2.facebook.com and learn that com is delegated to 13 name servers (2), so we ask h.gtld-servers.net where we learn that facebook.com is delegated to two name servers, including a.ns.facebook.com (3), so we ask that one and get the following answer: