I usually feel that a Todd Lammle book is a book to take seriously.  While studying for the CCIE Routing & Switching (R&S), I purchased this book anticipating a book worthy of the Lammle title.  While I was not too disappointed, I did not feel the book offered any information that I could not find elsewhere.  Also, while the book gave a good intro for most subjects (ISDN, Frame-Relay, NAT), I do not feel one would be able to walk away from the CCIE as feeling like you passed solely on this book.  I would not place this book within the top 15 books to use for the CCIE.  For example - on page 327, how can one show a table of possible protocols found in the protocol field of an IP Header WITHOUT including TCP (protocol 6) and UDP (protocol 17).  On the flip side, I did feel that the books discussion was a good intro to BGP - a topic which usually takes books to explain.  I give this book 3 pings out of 5: !!..!

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