Servidores DNS Principal (mname) y Secundario (rname)
host: dgae-siae.unam.mx
class: IN
ttl: 1799
type: SOA
mname: ns1.unam.mx
rname: dns.unam.mx
serial: 2026021100
refresh: 3600
retry: 1200
expire: 604800
minimum-ttl: 86400