We pick f.root-servers.net, one of the 13 root servers (1), and ask it about yahoo.cm and learn that cm is delegated to six name servers (2), so we ask kim.camnet.cm where we learn that yahoo.cm is delegated to four name servers, including ns2.yahoo.com (3), so we ask that one and get the following answer:
Yahoo.cm is a domain controlled by four domain name servers at yahoo.com. All four of them are on different IP networks. Yahoo.cm has two IP numbers (68.180.206.184, 98.139.102.145). Both are on different IP networks.
Yahoo.cm is ranked #864298 world wide and is hosted on two servers in Sunnyvale, CA, United States even though the hostname implies Cameroon. It has 202 inlinks.
The two IP numbers 68.180.206.184 and 98.139.102.145 together
There are several thousand of host names that point to the two IP numbers 68.180.206.184 and 98.139.102.145 together, hereafter referred to as "IP group 1".