We pick f.root-servers.net, one of the 13 root servers (1), and ask it about wwwgoogle.sk and learn that sk is delegated to eight name servers (2), so we ask a.tld.sk where we learn that wwwgoogle.sk is delegated to four name servers, including ns4.nic.sk (3), so we ask that one and get the following answer:
Wwwgoogle.sk is a domain controlled by three domain name servers at ltc.sk having a total of five IP numbers. Some of them are on the same IP network. Incoming mail for wwwgoogle.sk is handled by three mail servers at nic.sk and ltc.sk having a total of three IP numbers. Two mail servers have the same IP number. All three of them are on different IP networks. Wwwgoogle.sk has one IP number (81.89.56.32), but the reverse is ws1.ltc.sk.
All of the several hundred of host names that point to the IP number 81.89.56.32 point only to that ip number (example: appeal.sk, 3333.sk and zelina.net ).
Most of the more than a thousands domains that use the name server ns2.ltc.sk use the three name servers ns, ns1 and ns2.ltc.sk together, hereafter referred to as "name server group 2", (example: opice.sk, rovne.sk and zapasenie.sk ).
The three name servers ns, ns1 and ns2.ltc.sk together
Three percent of the more than a thousands domains that use name server group 2 point only to the IP number 193.105.142.14 (example: autoplachtytika.sk ).
The name server ns1.ltc.sk
Two percent of the more than a thousands domains that use the name server ns1.ltc.sk use name server group 1.
