| step | query | auth | servers |
| 1 | 90.10.8.128.in-addr.arpa. | . | (d,b,e,c,l,g,i,m,k,j,h,f,a).root-servers.net. |
| 2 | 90.10.8.128.in-addr.arpa. | in-addr.arpa. | (d,e,c,f,a,b).in-addr-servers.arpa. |
| 3 | 90.10.8.128.in-addr.arpa. | 128.in-addr.arpa. | (u,y,x,t,w,r,v,z).arin.net. |
| 4 | 90.10.8.128.in-addr.arpa. | 8.128.in-addr.arpa. | (ns1,ns2,noc).umd.edu. |
We pick