Bought this book and got burned just like everybody else. If it were possible to assign a negative star rating, this collection of dis-information would get five of those. Any material in these pages that isn't completely erroneous or irrelevant to the subject matter covered by the test is available absolutely free on the Cisco website or other similar sites. I'm currently pursuing the CCNP & CCDP certifications. My experience with the above title has put me off this publisher completely. And, as of this writing, they're the only ones offering texts supporting the CCNP/CCDP test curriculums. Save yourself the money and the time when it comes to this book -- it isn't even a worthwhile reference.