| step | query | auth | servers |
|---|
| 1 | 138.16.43.208.in-addr.arpa. | . | (h,i,f,g,a,m,e,k,j,b,d,c,l).root-servers.net. |
| 2 | 138.16.43.208.in-addr.arpa. | in-addr.arpa. | (c,f,e,a,b,d).in-addr-servers.arpa. |
| 3 | 138.16.43.208.in-addr.arpa. | 208.in-addr.arpa. | (w,r,z,v,y,x,u,t).arin.net. |
| 4 | 138.16.43.208.in-addr.arpa. | 43.208.in-addr.arpa. | (ns2,ns1).arpa.global-datacenter.com. |
We pick 
