;Time to live: 60 * 60 * 24 seconds
$TTL 86400

@ IN SOA i5.nyu.edu. mm64.i5.nyu.edu. (
   2004062401 ;serial number, p. 573
        21600 ;refresh: how often slave server should check serial numbers
         1800 ;retry: how long slave server should wait before trying again
       604800 ;expire: how long slave server should wait before discarding
          900 ;negative cache ttl: how long slave server should cache bad news
)

	IN	NS	i5.nyu.edu.
0	IN	PTR	loopback.    ;the imaginary network
1	IN	PTR	localhost.   ;the one machine on the imaginary network