Just passed CCNA . I used the Sybex 5th Edition book, and briefly skimmed through the CiscoPress INTRO and ICND books and used certmagic.com guides which were right on money . I only had 1 sim and about 2 or 3 NAT questions. There was a suprising amount about switching on the exam. There were also alot of diagram questions. Anyway, it was 53 questions and took me about 40 minutes to finish.