From the reviews of the second edition:
"This book on ns-2 can be used as a reference by researchers, as well as by undergraduate and postgraduate students. It will be useful for courses related to computer networks. ... It has added exercises at the end of the chapters that are meant to be used for assignments, lab exercises, and exam questions. ... I recommend this book for all those who are using ns-2 or plan to use it in the future. It will serve as a useful reference." (S. V. Nagaraj, ACM Computing Reviews, January, 2013)
"The book is designed to be a primer for the network simulator NS2. ... This textbook is written for researchers who need to use NS2 for simulation-based communication network performance evaluation. It can also be used as a reference for laboratory work for a senior undergraduate or graduate course on telecommunication networks." (IEEE Control Systems Magazine, June, 2012)