This book sucks! Its a shame there is not a "no stars" rating.In my opinion this book is a garentee to failure. It contains information on the old CIT exams, with one third of the current Cisco CIT topics not just missing but misleading. I bought this book, sat the exam and failed, the first exam I have ever failed (except for my driving test when I was 15).This book is a complete waste of your money!!Exam Cram, you should be ashamed of yourselves.