192.168.1.1    host1.class.net
192.168.1.2    host2.class.net
192.168.1.3    host3.class.net
192.168.1.4    host4.class.net
192.168.1.5    host5.class.net
192.168.1.6    host6.class.net
192.168.1.7    host7.class.net
192.168.1.8    host8.class.net
192.168.1.9    host9.class.net