Passed the Network+ (N004) yesterday. I used Mike Meyer's AIO Network+ and his practice tests for material. His book isn't bad and it matches his practice tests very well (and other online tests), though some of the questions out of the 800 were simply messed up/wrong. However, the Network+ exam was really different than the practice tests provided, as about 60-70% of the exam was all troubleshooting (this user is having a problem/did something, what is the most likely cause?). Only a few question on command line tools (I was not presented with an image at all throughout the test), no subnetting at all (which is a shame as I feel confident in that area), only one or two questions on authentication, a few on cables, few on OSI, and the rest of the filler were port numbers. I know this test is about to retire so I don't know if this information will help anyone but here it is.
The book that I do recommend to people who, like my self, have trouble grasping the WAN technologies should check out this book: Telecommunications Essentials (
http://www.amazon.com/Telecommunications-Essentials-Second-Complete-Global/dp/0321427610/ref=sr_1_1?ie=UTF8&qid=1326413682&sr=8-1 )
This book helped answered the WHAT and WHY about a technology (for instance, WHAT exactly IS Frame Relay and WHY was it needed?) You don't need the information to answer the WAN questions on the Network+ (I just got the book a day prior to the exam and only got to read some parts, reading lots of it now), but for those who want to understand the technology a lot better than the short paragraph or two that you are given, this is not a bad buy for the $18 used.
Good luck to all taking the test.