Ah.. they are talking about a DNS zone file.
Here's one for example..... But they don't need it.. So not sure why they are asking.
It just contains mappings etc.
$TTL 86400 ; 24 hours could have been written as 24h or 1d
; $TTL used for all RRs without explicit TTL value
$ORIGIN example.com.
@ 1D IN
SOA ns1.example.com. hostmaster.example.com. (
2002022401 ; serial
3H ; refresh
15 ; retry
1w ; expire
3h ; nxdomain ttl
)
IN
NS ns1.example.com. ; in the domain
IN NS ns2.smokeyjoe.com. ; external to domain
IN
MX 10 mail.another.com. ; external mail provider
; server host definitions
ns1 IN
A 192.168.0.1 ;name server definition
www IN A 192.168.0.2 ;web server definition
ftp IN
CNAME www.example.com. ;ftp server definition
; non server domain hosts
bill IN A 192.168.0.3
fred IN A 192.168.0.4