$TTL    3600
@       IN      SOA     ROOT-SERV. root. (
                   2025052100           ; Serial
                         3600           ; Refresh [1h]
                          600           ; Retry   [10m]
                        86400           ; Expire  [1d]
                          600 )         ; Negative Cache TTL [1h]
;
@       IN      NS      ROOT-SERV.


ROOT-SERV     IN      A     90.90.0.10
mos.          IN     NS    sethi.mos.
              IN    NS     kheops.mos.
80.80.in-addr.arpa. IN  NS  sethi.mos.
                    IN  NS kheops.mos.
sethi.mos.         IN  A   80.80.0.20
kheops.mos.        IN A        80.80.0.10