There are quite a large number of books already available on the subject of internet. This book will be immense use to all across the Information Technology divide. It will be guide academicians importing advanced IT. The present one is an attempt to make subject more up to date , understandable , interesting & relevant in the view of complex and nature of phenomena of internet there is a continuously need to provide up to date information for teacher & students. There is a special emphasis on P.G. Students using internet facility in the campus. For the purpose of data analysis we have to use figure tables etc. to make matter more interesting and easy to understand. In this book figures have been collected from authentic and reliable sources.