Well, I can't give the exact stuff to study(because it is prohibited, and it changes test to test), but things that I found useful studying:
VLANs:
basic operation, basic setup commands
STP:
basic operation
Subnetting:
deep understanding, able to situational problems
Router configuration:
Basic Setup(IP address, Password, show run, write mem, etc)
Ethernet cabling:
Cross-over, Straight, Rollover pin out and uses
Routing Protocols:
RIP and IGRP (setup and configuration)
Know about what the difference between link-state and distance vector.
Really the test is pretty comprehensive and impossible to do a last minute cram of the *important* topics. My suggestion is to look over your notes, or if your book had a summary at the end of each chapter, look over it for 30 minutes to an hour before the exam. All the last minute stuff is really there for is to remind you about the topic, not for you to cram it and relearn a topic. Hopefully this helps... Good luck on the test. Let us know how it goes.
Burke