I will use two methods to convert a decimal number to 8-bit long binary. Method 1 is a repeated "find and subtract" method. Method 2 is a repeated division-by-2 method.
Knowing how to convert from decimal to binary or from binary to decimal is useful.
We will use this knowledge when we are talking about secret of subnet mask, how to calculate the # of hosts, five IP classes, and subnetting.
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