次に示すのは、2 つのネットワーク上の 2 つの主サーバーで使われている db.doc ファイルと db.sales ファイルです。
; SOA rec doc.com. IN SOA sirius.doc.com. sysop.centauri.doc.com. ( 19970332 ; serial number 10800 ; refresh every 3 hours 10800 ; retry every 3 hours 604800 ; expire after a week 86400 ) ; TTL of 1 day ; Name Servers doc.com. IN NS sirius.doc.com. sales.doc.com. IN NS altair.sales.doc.com. ; Addresses localhost IN A 127.0.0.1 sirius IN A 123.45.6.1 rigel IN A 123.45.6.112 antares IN A 123.45.6.90 polaris IN A 123.45.6.101 procyon IN A 123.45.6.79 tauceti IN A 123.45.6.69 altair.sales.doc.com. IN A 111.22.3.4 ; aliases dnsmastr IN CNAME sirius.doc.com. dnssecond.doc.com IN CNAME deneb.doc.com
; SOA rec sales.doc.com. IN SOA altair.sales.doc.com. sysop.polaris.doc.com. ( 19970332 ; serial number 10800 ; refresh every 3 hours 10800 ; retry every 3 hours 604800 ; expire after a week 86400 ) ; TTL of 1 day ; Name Servers doc.com. IN NS sirius.doc.com. sales.doc.com. IN NS altair.sales.doc.com. ; Addresses altair IN A 111.22.3.4 localhost IN A 127.0.0.1 sirius.doc.com. IN A 123.45.6.1 luna IN A 192.168.8.22 phoebus IN A 192.168.8.24 deimos IN A 192.168.8.25 ganymede IN A 192.168.8.27 europa IN A 192.168.8.28 callisto IN A 192.168.8.29 ; ; aliases dnssales.sales.doc.com IN CNAME altair.sales.doc.com