Servidores DNS Principal (mname) y Secundario (rname)
host: sap-soft.com
class: IN
ttl: 86400
type: SOA
mname: ns.sap-ag.de
rname: dns.sap-ag.de
serial: 2025121801
refresh: 86400
retry: 1800
expire: 604800
minimum-ttl: 3600