
I'm planning taking exam within one month (640-802).
I just wondering which u guys using sim?
So far, I found
-Boson NetSim for CCNA 7.0
-Packet Tracer 4.1
-CCNA™ Network Visualizer® 6.0
and I believe there is more.
I using Packet Tracer 4.1, also I'm taking the new verison exam which is 640-802. I maybe wrong or not, Packet Tracer 4.1 cover only 640-801, but Boson Net 7.0 and CCNA Network Visualizer is cover 640-802 exam.

Which SIM is the best? Or else more to list. Thank!
Oh,
p.s.
CCNA Cisco Certified Network Associate Study Guide Sixth Edition
-Sybex by Todd Lammle, CCSI
This only book I have so far. I hope this will help me out to understand whole ccna. U think? or other book rather than this?