| step | query | auth | servers |
|---|
| 1 | 100.34.194.173.in-addr.arpa. | . | (b,a,k,h,c,g,f,i,e,l,j,d,m).root-servers.net. |
| 2 | 100.34.194.173.in-addr.arpa. | in-addr.arpa. | (c,d,a,f,e,b).in-addr-servers.arpa. |
| 3 | 100.34.194.173.in-addr.arpa. | 173.in-addr.arpa. | (x,r,w,y,v,u,t,z).arin.net. |
| 4 | 100.34.194.173.in-addr.arpa. | 194.173.in-addr.arpa. | (ns4,ns2,ns3,ns1).google.com. |
We pick 
