Servidores DNS Principal (mname) y Secundario (rname)
host: hacker.com
class: IN
ttl: 3600
type: SOA
mname: ans01.consolidated.net
rname: dnsadmin.consolidated.net
serial: 2007091853
refresh: 10800
retry: 3600
expire: 1209600
minimum-ttl: 900

Servidor de Correo
host: hacker.com
class: IN
ttl: 3600
type: MX
pri: 10
target: filter.hacker.com