$TTL 86400
@	IN	SOA	web1	tanaka (
			2005111401	; Serial
			3H		; Refresh
			15M		; Retry
			1W		; Expire
			1D )		; Minimum

	IN	NS	web1
	IN	MX	10	mail
	IN	A	192.168.100.11
router	IN	A	192.168.100.1
web1	IN	A	192.168.100.11
mail	IN	A	192.168.100.11
www	IN	A	192.168.100.11