We pick g.root-servers.net, one of the 13 root servers (1), and ask it about autoservicio.uasd.edu.do and learn that do is delegated to eight name servers (2), so we ask ns1.nic.do where we learn that uasd.edu.do is delegated to two name servers, including ns2.uasd.edu.do (3), so we ask that one and get the following answer: