Welcome to the authors' website for the textbook, Computer Networking: a Top Down Approach (Pearson). The 9th edition of our textbook has been published in the summer of 2025 - find out what's new in the 9th edition. Using the menus at the top of this page, you can find resources and information of interest to students, teachers, and readers alike.

Since the publication of the first edition 26 years ago, our book has been adopted at many hundreds of colleges and universities, translated into 14 languages, and used by literally millions students and practitioners worldwide. We’ve been overwhelmed by the positive response.

This textbook is for a first course on computer networking. It has been used in computer science and electrical engineering departments, information systems and informatics departments, in business schools, and elsewhere - at both the undergraduate and graduate levels. It should also be of interest to practitioners in industry as well. Find out more about the textbook here.

You can get access to this book either as an online book, a rental of a hardcopy, or you can purchase your own hardcopy. The Pearson site for the 9th edition is here.