Servidores DNS Principal (mname) y Secundario (rname)
host: bartcatz.com
class: IN
ttl: 3600
type: SOA
mname: ns1.name.com
rname: hostmaster.nsone.net
serial: 1767654316
refresh: 43200
retry: 7200
expire: 1209600
minimum-ttl: 3600