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If you are attempting to learn networking protocols in general, there are higher quality books available. If your goal is to learn a network stack on an embedded processor (In particular the PIC), this is not a bad book as source code is included. To be successful and focused on the software, you'll need to invest another [$] for the PCW version of CCS's compiler, and another [$] for the Microchip PIC.net demo board (Unless you have very good prototyping skills). Note that the first edition of this book comes with the Microchip PIC.net demo board which is sufficent.
Unfortunately, after having the book for two weeks now, I can tell you that I've gotten far more value out of Stevens' "TCP/IP Illustrated" series.
The source code included on the CD-ROM is licensed for personal use only, and it appears that probably %90 of the code is included in hardcopy format inside the book.
Finally, the network traces are practically unreadable: it would have been easier to read if the author had used tcpdump, instead of his own style of printf's.
What I wanted was a concise guide to how to strip down TCP/IP to get it running on small systems: what I could delete, what I had to keep, and the tradeoffs of doing so. When I finish filtering through all the source code and simply focus on the text, that may be what I end up with.
But since I don't have much time, the book will probably sit on the floor, and I'll keep Stevens on the desk.
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If one can come away from it with a general sense of what utilitarianism is, what act utilitarianism is, and how it gets from egoism in psychology to neutralism in ethics, one has done pretty well. This should help the reader start thinking about what some of the problems with this theory are, how it measures up to its competitors, and how it can be applied to specific problems.
The best news for those who have braved this text is that Mill and other later thinkers will seem like poetry in motion by comparison.
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Since Dr. Who has been an institution in England, we forget how much of a risk the show was back in the day it was first conceived and how no one knew what a phenomenon it would become. This book brings that feeling back.