10.42.0.0/23 delen door twee

ip addr 00001010.00101010.00000000.00000000
subnet  11111111.11111111.11111110.00000000 = oud subnet mask
subnet  11111111.11111111.11111111.00000000 = nieuw subnet mask
1e helf 00001010.00101010.00000000.00000000 = 10.42.0.0/24
2e helf 00001010.00101010.00000001.00000000 = 10.42.1.0/24

10.42.1.0/24 delen door twee
network 00001010.00101010.00000001.00000000 = 10.42.1.0/24
subnet  11111111.11111111.11111111.00000000 = oud subnet mask
subnet  11111111.11111111.11111111.10000000 = nieuw subnet mask

1e netw 00001010.00101010.00000001.00000000 = 10.42.1.0/25
2e netw 00001010.00101010.00000001.10000000 = 10.42.1.128/25


10.42.0.0/23 delen door vier

1e netw 00001010.00101010.00000000.00000000 = 10.42.0.0/25
2e netw 00001010.00101010.00000000.10000000 = 10.42.0.128/25
3e netw 00001010.00101010.00000001.00000000 = 10.42.1.0/25
4e netw 00001010.00101010.00000001.10000000 = 10.42.1.128/25