| step | query | auth | servers |
| 1 | 175.176.30.123.in-addr.arpa. | . | (j,k,f,e,d,c,g,a,h,b,l,m,i).root-servers.net. |
| 2 | 175.176.30.123.in-addr.arpa. | in-addr.arpa. | (a,c,f,e,b,d).in-addr-servers.arpa. |
| 3 | 175.176.30.123.in-addr.arpa. | 123.in-addr.arpa. | ns3.apnic.net. ns4.apnic.net. ns1.apnic.net. tinnie.arin.net. ns2.lacnic.net. apnic1.dnsnode.net. sec1.authdns.ripe.net. |
| 4 | 175.176.30.123.in-addr.arpa. | 30.123.in-addr.arpa. | (vdc-hn01,hcm-server1).vnn.vn. |
We pick