Servidores DNS Principal (mname) y Secundario (rname)
host: kyuuujin.net
class: IN
ttl: 120
type: SOA
mname: nsk0.secure.ne.jp
rname: hostmaster.cpi.ad.jp
serial: 2207040000
refresh: 3600
retry: 900
expire: 3600000
minimum-ttl: 120