We pick k.root-servers.net, one of the 13 root servers (1), and ask it about unixtech.com.tw and learn that tw is delegated to ten name servers (2), so we ask a.dns.tw where we learn that com.tw is delegated to seven name servers, including d.twnic.net.tw (3), so we ask that one and learn that unixtech.com.tw is delegated to two name servers (4), so we ask dns1.unixtech.com.tw and get the following answer:
Unixtech.com.tw is hosted on a server in Taipei, 03, Taiwan.
The two name servers com and olguin.us together
All of the four domains that use the two name servers com and olguin.us together, hereafter referred to as "name server group 1", point only to the IP number 184.168.82.83.
The three name servers com, olguin.us and com.olguin.us together
All of the four domains that use the three name servers com, olguin.us and com.olguin.us together, hereafter referred to as "name server group 2", point only to the IP number 99.113.194.67.
The name server com
There are eight domains that use the name server com.
Four of those point only to the IP number 99.113.194.67.
Four of them use name server group 1.
Four of them use name server group 2.
Four of them point only to the IP number 184.168.82.83.
The IP number 210.61.240.20
There are three host names that point to the IP number 210.61.240.20.
All of those point only to that ip number.
One of them use the two name servers com and unixtech.com.tw together, hereafter referred to as "name server group 3".
The IP number 210.61.240.20 only
One of the three host names that point only to the IP number 210.61.240.20 use name server group 3. Worth noting is that all of the domains that use name server group 3 point only to the IP number 210.61.240.20.
The name server unixtech.com.tw
There are one domains that use the name server unixtech.com.tw.
All of those point only to the IP number 210.61.240.20.
All of them use name server group 3.
The two name servers com and unixtech.com.tw together
All of the one domains that use name server group 3 point only to the IP number 210.61.240.20. Worth noting is that one of the host names that point only to the IP number 210.61.240.20 use name server group 3.
