| step | query | auth | servers |
| 1 | 10.255.171.69.in-addr.arpa. | . | (k,g,m,a,f,l,h,i,j,b,e,d,c).root-servers.net. |
| 2 | 10.255.171.69.in-addr.arpa. | in-addr.arpa. | (d,c,a,b,e,f).in-addr-servers.arpa. |
| 3 | 10.255.171.69.in-addr.arpa. | 69.in-addr.arpa. | (u,x,r,v,y,w,t,z).arin.net. |
| 4 | 10.255.171.69.in-addr.arpa. | 255.171.69.in-addr.arpa. | (b,a).ns.facebook.com. |
We pick