| step | query | auth | servers |
|---|
| 1 | 60.54.139.98.in-addr.arpa. | . | (f,i,h,c,d,b,j,a,m,g,l,e,k).root-servers.net. |
| 2 | 60.54.139.98.in-addr.arpa. | in-addr.arpa. | (f,a,b,d,c,e).in-addr-servers.arpa. |
| 3 | 60.54.139.98.in-addr.arpa. | 98.in-addr.arpa. | (r,t,x,w,v,z,u,y).arin.net. |
| 4 | 60.54.139.98.in-addr.arpa. | 139.98.in-addr.arpa. | (ns3,ns4,ns2,ns1,ns5).yahoo.com. |
We pick 
