$TTL 86400
@               86400   IN      SOA     dns.exa.com.    root.dns.exa.com. (
                        2008032701 ; serial
                        28800 ; refresh
                        14400 ; retry
                        3600000 ; expire
                        0 ; negative cache ttl
                        )

@		IN	NS		dns.exa.com.
1		IN 	PTR		r1.exa.com.
2		IN 	PTR		dhcp.exa.com.
3		IN	PTR		http.exa.com.
10		IN 	PTR		dns.exa.com.
