Writing a book is tempting, many ideas and topics, idea after idea, topic upon topic,
what to elaborate, which one to mention, the reader must find a satisfying answer,
enough knowledge; and overlooking or going-by topics is a painful choice for the
author, as space is limited, a hard decision is to be made without compromising
what should be transferred to the audience. Writing a scientific book is like navigat-
ing across the Nile, the Mediterranean, the Atlantic, or the Indian Ocean in a boat or
a glass submarine, looking and searching for known and unknown species, appreci-
ating diversified colors and variety of sizes, and collecting knowledge for benefit in
the near future. For a third time, I navigated, explored, day and night, when cold or
hot, whether windy or breezing, without tolerating a least chance to know and learn.
Networking is a field of integration of hardware and software, protocols and
standards, simulation and testbeds, wired and wireless, VLSI and communication,
an orchestrated harmony that collaborates dependably, all for the good of a con-
nected well-performing network. That is the charm of networking, of life in a civi-
lization that recognizes differences and goes on.
In introductory computer networking books, chapter sequencing follows the
bottom-up or top-down architecture of the seven layers protocol. This book starts a
few steps after, both horizontally and vertically, the view and understanding are get-
ting clearer, with chapter ordering based on topics significance to the elaboration of
wireless sensor networks (WSNs) concepts and issues.