Here is the PDF version of this book.Chapter 3 Virtual memory3.1 A bit of information theoryA bit is a binary digit; it is also a unit of information. If youhave one bit, you can specify one of two possibilities, usuallywritten 0 and 1. If you have two bits, there are 4 possiblecombinations, 00, 01, 10, and 11. In general, if you have b bits, youcan indicate one of 2b values. A byte is 8 bits, so it canhold one of 256 values.