Table 1. Status of IP allocation for each domain.

DOMAIN	SERVER	ADDRESS	IP	NOTE
example.com	DNS, Gateway	ns.example.com	192.168.10.1	Ubuntu linux server
	Web	www.example.com
	Mail	mail.example.com
dslab.com	DNS, Gateway	ns.dslab.com	192.168.20.1	Ubuntu linux server
	Web	www.dslab.com	192.168.20.10
	Mail	mail.dslab.com	192.168.20.20
edu.com	DNS, Gateway	ns.edu.com	192.168.30.1	Windows Server
	Web	www.edu.com	192.168.30.10
	Mail	mail.edu.com	192.168.30.20