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I found this book to be very helpful. As a network support engineer, I needed to understand the basic principles of how routing protocols work. This book is the best example that I have found for helping me to understand these concepts. I learn by doing better than I learn by just reading which is why I like the workbook style of this book. that lends itself to going into a lab and experimenting with these concepts. Some readers might be put off by this book if they were expecting a book that is best read over a cup (or pot) of coffee. I believe that the real benefit of this book is in the doing of what it covers; not the reading.
My other review comments are in response to some of the critical reviews from other readers of this book. It really bothers when somebody trashes a networking book in a review when the person doing the review isn't somebody the book was intended to help. The problem is exacerbated when the reader hasn't taken the time to really understand the purpose of a book.
In the case of Mr. Papen's review, he missed the point that the only reason any routing protocols were mentioned in this book was because the topics that the core of the book - convergence, split horizon, default gateways, discontinuous networks, & VLSM - require that a routing protocol is used in order to demonstrate them. These topics apply as much to OSPF, EIGRP and BGP as they do to RIP & IGRP. Adding material about OSPF, EIGRP and BGP would only have added unnecessary complexity to the points being made. To say that "...I have *never* heard the nomenclature used in this book anywhere to describe networks..." doesn't mean that this nomenclature doesn't exist - it means that until this book was written, this nomenclature was not commonly included in books on IP routing; which by-the-way was probably a key reason why the author wrote the book in the first place. I suggest that Mr. Papen read rfc1812.txt and rfc1058.txt. I would also like to point out that based on the table of contents; this was book was not written "...to explain networking..." as such. When a reader purchases a book that is inappropriate for his or her requirements; he or she need only return it and look for another book. You shouldn't trash a book in a review because it wasn't what you were expecting anymore than you should trash a hardware store because you purchased the wrong size of nails or the wrong type of screw driver.
In the case of Mr. Macfarlanes's review, Mr. Macfarlane also missed the point that the only reason any routing protocols were mentioned in this book was because the topics that the core of the book - convergence, split horizon, default gateways, discontinuous networks, & VLSM - require that a routing protocol is used in order to demonstrate them.

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