| step | query | auth | servers |
| 1 | 41.0.14.121.in-addr.arpa. | . | (a,e,d,m,c,k,i,g,f,b,l,h,j).root-servers.net. |
| 2 | 41.0.14.121.in-addr.arpa. | in-addr.arpa. | (d,f,e,b,c,a).in-addr-servers.arpa. |
| 3 | 41.0.14.121.in-addr.arpa. | 121.in-addr.arpa. | tinnie.arin.net. ns3.apnic.net. apnic1.dnsnode.net. ns1.apnic.net. ns2.lacnic.net. sec1.authdns.ripe.net. ns4.apnic.net. |
| 4 | 41.0.14.121.in-addr.arpa. | 14.121.in-addr.arpa. | (dns,ns).guangzhou.gd.cn. |
We pick