My employer wants me to get a CCNA certification in the near future. I know the networking basics pretty well, but I don't have any experience with Cisco gear. We're willing to pay for one of the bootcamp-style courses, but I'd like to be able to do some reading about it beforehand.
So, let me know what works/worked for you.
Community wiki, because there's no "right" answer here. However, I feel like it would be a valuable thing to have around, given how many sysadmins end up working with the networking gear.