Note that the bits go up in powers of 2, so the 9th bit has a decimal weight of 256. 255 appears a lot in IP addressing. I ll illustrate shortly. We need to construct another calculator for handy reference. There is a thing called net masking which we will treat later in the article.
Standard procedure says to start the masking from the left and work down.
So let s construct a table for this which can act as a calculator . This says that if your byte is 11100000, then the decimal equivalent value, from Table 2, is 224. We have now set the groundwork for IP addressing. I will treat the standard IPv4 addresses. The IP addresses are sometime called dotted quad numbers.