00010000.00000100.00000000 00010000.00000010.0000000...

10101100.00010000.00000100.00000000 10101100.00010000.00000010.00000000We can use the default subnet masks to define our network, or we can use a customsubnet mask.The ability to define the subnet mask allows us to take the default networkdefinition and “borrow” bits from the available hosts on that network in order to createsmaller logical networks, or subnets.

E XERCISE 3.03

F UN WITH B INARY N UMBERS

In this exercise, you will use the scientific mode of Windows Calculator to con-vert binary numbers to decimal numbers and vice versa.