| step | query | auth | servers |
| 1 | 1.100.168.192.in-addr.arpa. | . | (a,m,c,k,h,i,d,e,j,l,f,g,b).root-servers.net. |
| 2 | 1.100.168.192.in-addr.arpa. | in-addr.arpa. | (e,b,d,a,f,c).in-addr-servers.arpa. |
| 3 | 1.100.168.192.in-addr.arpa. | 192.in-addr.arpa. | (v,y,w,x,t,u,r,z).arin.net. |
| 4 | 1.100.168.192.in-addr.arpa. | 168.192.in-addr.arpa. | (blackhole-2,blackhole-1).iana.org. |
We pick