This book has been prepared for the computer science graduates to help them understand the basic to advanced concepts related to Data Communication and Computer Networking. After completing this book you will find yourself at a moderate level of expertise in Data Communication and Computer Networking from where you can take yourself to next levels.
Before you start proceeding with this book, I'm making an assumption that you are already aware about basic computer concepts like what is keyboard, mouse, monitor, input, output, primary memory and secondary memory etc.