Software-defined networking (SDN) and network function virtualization (NFV) are now popular buzzwords. On one hand, this fact is related to the prevailing usage of these two groups of concepts in practical applications of modern distributed systems. On the other hand, SDN and NFV are still perceived by researchers as very promising topics. Therefore, a book introducing these topics appeared to me as interesting and promising. However, Doherty’s book is atypical in comparison to what is reviewed in Computing Reviews: it presents very basic ideas and is generally not aimed at professionals. While the most important aspects of the covered topics are given (the basics of virtualization, how it works in data centers, the kinds of network functions that can be virtualized and in what way, the concept of SDN and the supporting mechanisms), this is done (on purpose) at a very simple level, presenting a convincing rationale and how the concepts work in general. Nevertheless, despite my initial skeptical attitude toward such a book, I find this position extremely useful for a very broad group of readers: not only laymen in computer technology (to whom the book is addressed) will benefit, but experts (mainly teachers) will as well.

As stated, Doherty aims to reach readers who do not want to gain deep knowledge of SDN or NFV. Basically, the book can be read by those without any prior knowledge, except for an awareness of the main building elements of computers and networks (in the sense of hardware, software, and protocols). Readers who have some basic knowledge of computers and would like to extend their awareness of the hot topics related to clouds, data centers, and so on obviously will gain a little bit more than those with zero prior knowledge. The book can be successfully used by an undergraduate student in computer science or networking who is an SDN and NFV layman: a very well-structured lecture on easy-to-understand and convenient-to-remember fundamental background ideas is provided. However, to learn the material at a practical level, other sources and personal practice are indispensable.

For the expert reader, this book would be a perfect source of inspiration for preparing very short and catchy presentations of the core ideas in this area. Its usefulness for lecturers preparing slides for basic courses dealing with modern networking, operating systems, or SDN is unquestionable. Much information can be gained by looking at the given figures and their captions, as well as by reading the accurate and catchy summaries finalizing each chapter. The blocks of text are very short, and can be read in short breaks while drinking coffee.

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