We pick j.root-servers.net, one of the 13 root servers (1), and ask it about simak.unsil.ac.id and learn that id is delegated to four name servers (2), so we ask ns1.rad.net.id where we learn that ac.id is delegated to seven name servers, including b.dns.id (3), so we ask that one and learn that unsil.ac.id is delegated to two name servers (4), so we ask ns1.unsil.ac.id and get the following answer: