Conversion of Decimal IP Address 100.235.2.2 to Binary

Table B-15 begins with the decimal IP address in the first row, and the results of each of the three conversion steps in the next three rows. The actual math for converting the decimal numbers (Step 1) is not shown, but you can refer to the previous section for examples using decimal 100 and 235. For the first, third, and fourth octets, the converted binary numbers are less than 8 bits long, so at Step 2, binary 0s were added to the left to make them all 8 bits long. Step 3 just lists all 32 bits in succession. In real life, there's no need to actually write down Step 3; you can just see the 4 sets of 8 bits all in a row and think of it as a 32-bit number.