10.0.0.0- class A

172.16.0.0-class B

192.168.1.0-class C

172.16.8.3

255.255.0.0

255= Network 0= random number

subnet mask = 0 or 255 eg 255.255.0.0

numbers can range from 0-255 ONLEY! there are always four numbers

10.0.0.0- class A

172.16.0.0-class B

192.168.1.0-class C

each ip adress is unique on the network ‘families’ of computers share a common network adress e.g adresses would look like 10.25.47.45, 10.25.78.35 10.25.75.34