We pick k.root-servers.net, one of the 13 root servers (1), and ask it about msb.gov.tr and learn that tr is delegated to six name servers (2), so we ask ns1.nic.tr where we learn that msb.gov.tr is delegated to two name servers, including msbintsec.msb.gov.tr (3), so we ask that one and get the following answer:
Msb.gov.tr is a domain controlled by two domain name servers at msb.gov.tr and msbintsec. We are missing the IP:s of one server: msbintsec. Incoming mail for msb.gov.tr is handled by three mail servers at msb.gov.tr themselves. All three of them are on the same IP network.