Servidores DNS Principal (mname) y Secundario (rname)
host: pubmedcentralcanada.ca
class: IN
ttl: 2234
type: SOA
mname: ns10.ent.global.gc.ca
rname: ssc\.enterpriseddi-entreprise\.spc.ssc-spc.gc.ca
serial: 2024080838
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 3600