We pick g.root-servers.net, one of the 13 root servers (1), and ask it about www.spfc.net and learn that net is delegated to 13 name servers (2), so we ask d.gtld-servers.net where we learn that spfc.net is delegated to two name servers, including ns1.terra.com.br (3), so we ask that one where we see a CNAME from www.spfc.net to br-parc-spfcweb01.terra.com.br, so we have to start all over again. We pick h.root-servers.net, one of the 13 root servers (4), and ask it about br-parc-spfcweb01.terra.com.br and learn that br is delegated to six name servers (5), so we ask e.dns.br where we learn that terra.com.br is delegated to four name servers, including a.dns.terra.com (6), so we ask that one and get the following answer: