The netmasks table contains the network masks used to implement standard Internet subnetting. The table has three columns:
| Column | Description |
|---|---|
| Addr | The IP number of the network |
| Mask | The network mask to use on the network |
| Comment | An optional comment about the entry |
For network numbers, you can use the conventional IP dot notation used by workstation addresses, but leave zeroes in place of the workstation addresses. For example, this entry
128.32.0.0 255.255.255.0
means that class B network 128.32.0.0 should have 24 bits in its subnet field, and 8 bits in its host field.