Just failed 640-801
...with a score of 752 I really underestimated this test... I couldn't really pinpoint one concept that I was deficient in; it was just that there were so many details that I wasn't sure of. I'm pretty sure I got both of the simulations correct, but I could be wrong. I guess the best thing to do now is just buy some routers or a simulation and play with them for many, many hours... Any suggestions?