I ordered the 4th edition, because it was cheaper. I've never seen the 5th edition though. In the 4th edition, they spend too much time talking about 1900 series routers, Pre IOS Version 12 and Pre Y2K stuff. When I studied for the CCNA exam, this book was only 10% useful. It's an OK reference book if you don't have anything else though.

This is the 1 and only source I used to study for the exam and I passed it on my first attempt scoring just over 900. I found nothing in the book that ran counter to my experience and found it to be thorough and detailed. I did however have 2 years of working with Cisco Routers/Switches behind me before I began studying, so my learning curve was nowhere near that of someone trying to get a "Book Cert" with no hands on experience.

I just was looking through the books and noticed that this it the 4th edition. The 5th edition has the latest info, and Sybex finally has updates on the web site. Great concept for continually changing tests....

I read the book...All of it,
When I start solving exams,,,,,I was disappointed...Its good that I didnt take the exams depending on the book and the 4 bouns exams included in the CD.Now I start to review most of the topics from :
CCNA Self-Study
CCNA ICND
Exam Certification Guide
Wendell Odom, CCIE No.1624

That made me need more days before going to the exams.

A great book for the aspiring CCNA. This is the #1 CCNA book on the market today. Grab the latest edition for the most up-to-date test coverage.

The only thing that would have made this book better, would have been error correction. Be sure to check Sybex's website for all the errata corrections.