| step | query | auth | servers |
|---|
| 1 | 107.91.108.193.in-addr.arpa. | . | (j,k,b,g,m,h,i,a,f,d,e,c,l).root-servers.net. |
| 2 | 107.91.108.193.in-addr.arpa. | in-addr.arpa. | (f,d,a,b,e,c).in-addr-servers.arpa. |
| 3 | 107.91.108.193.in-addr.arpa. | 193.in-addr.arpa. | tinnie.arin.net. sec1.apnic.net. pri.authdns.ripe.net. ns3.nic.fr. sec3.apnic.net. sns-pb.isc.org. |
| 4 | 107.91.108.193.in-addr.arpa. | 91.108.193.in-addr.arpa. | (usc1,asia2,use1,ns1-127,usw3,ns1-61,eur2,ns1-122).akam.net. |
We pick 
