Registro IPv4
host: mcblab.co.kr
class: IN
ttl: 7200
type: A
ip: 121.78.251.17

Servidores DNS Principal (mname) y Secundario (rname)
host: mcblab.co.kr
class: IN
ttl: 7200
type: SOA
mname: ns1.ssandom.com
rname: root.ssandom.com
serial: 2022070200
refresh: 43200
retry: 3600
expire: 1209600
minimum-ttl: 7200