The book appears to be a compilation of white paper drafts by different people - no clear purposes for solutions, features mis-presented for benefits, no clarity in arguments let alone logic behind, exact paragraphs appearing in several places even before I got to page 80, obvious grammatical errors all over that sometimes I couldn't even begin to guess what the authors were trying to say. This reminds me of one of those C- group papers in university put together in the last minute w/o much efforts or thoughts. Disappointed and suprised the book was written by Cisco people and published by Cisco press.