Are you going to take the 2.1.4 test or the new 3.0 test?
At any rate I'm going to tell you that you need to get in the rythym of taking tests that require you to pick 2 or 3 correct answers out of a list.
The test hits heavy on subnetting (you should be able to subnet in your sleep, know well how to subnet Class A and B ip addresses because C's are th easiest), the OSI model, VLANs, access lists, PPP, Frame relay, routing and routed protocols and of course commanding the router ie. commands, what prompt to place them at and interpretation of said output.
I'd go on the net and find some sample questions. Even Cisco is in the game of putting up sample questions, even sponsoring a site that sells sample tests.