I would argue that you definitely need to do some extensive "brushing up" whether that is taking a class or self study (depending on your budget and time allotted to achieve the exam). If you happen to be in the field and have been constantly working within these realms of test objectives, then you can possibly get away with preparing with an updated version of a CCNA book. However, if you have not had much practice or feel you may learn best in an interactive environment such as a class, I highly recommend perusing that option.
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