DNS delegation of glb1.facebook.com updated: May 18, 2013 7:40:44 PM
Delegation
step
query
auth
servers
1
glb1.facebook.com.
.
(e,g,h,c,k,j,i,m,l,b,d,f,a).root-servers.net.
2
glb1.facebook.com.
com.
(g,k,l,b,a,i,d,j,f,h,c,e,m).gtld-servers.net.
3
glb1.facebook.com.
facebook.com.
(a,b).ns.facebook.com.
We pick e.root-servers.net, one of the 13 root servers (1), and ask it about glb1.facebook.com and learn that com is delegated to 13 name servers (2), so we ask g.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: