The book is written for the readers who already have a little knowledge of the Computer Networks and want a quick revision of the concepts and programs. This is not an introduction of the Computer Networks rather a hands on booklet to go through and revise quickly. It is recommended that to understand the basics, history and evolution of the Computer Networks you first go through the books given in references. If you are not new to the Computer Networks you can directly start learning from the book. In this book students can also take advantages of step step implementation of many server based on windows platform. Happy Learning!!!