Registro IPv4
host: ciscocertificates.com
class: IN
ttl: 600
type: A
ip: 63.134.215.91

Servidores DNS Principal (mname) y Secundario (rname)
host: ciscocertificates.com
class: IN
ttl: 1800
type: SOA
mname: ns1.cisco.com
rname: postmaster.cisco.com
serial: 29
refresh: 7200
retry: 1800
expire: 864000
minimum-ttl: 1800

Servidor de Correo
host: ciscocertificates.com
class: IN
ttl: 600
type: MX
pri: 1
target: mail.ciscocertificates.com