Hi Robo,
I am an CompTIA A+ certified professional, and currently working on my Network+ in order to get closer to achieving my MSCA certification. I went throug a 9mos Cisco Netwroking Academy Program, and I still have'nt taken my CCNA exam as of yet, reason why you ask? I want to ensure I am prepared. The best advice I can give is "Man your gunz!" in otherwords study and prepare to the point where you can take quizez and chapter exams and have the answres virtually "jump of the pages at you!" This is known to test takers as a comfort zone not a complacency zone! Also since most of these test are adaptive (meaning your answer can not be retracted, then you must make a decison if you are spending alot of time on it. example if it is a multiple choice question then try to eliminate the answers that you fedel make not much sense and then take your best shot at the other(s). Todd Lammle put out some great books on CCNA, He is currently up to his forth addition, along with the current title and the Sybex CCNA Virtual Lab(E-Trainer) you can prepare yourself. Taking Network+ will offer you a simular challenge, you will need to learn the OSI, and DOD models as well, understand media and thier respective functions LAN/WAN are also included along with various other concepts related to basic networking. Again sybex has an awesome book on the subject. The one that I am currently reviewing is ISBN: 0-7821-4014-9 by David Groth. Hope this helps and offers some encouragement.
"Don't Give Up, havg in thier and really study!"
"Don't just be a paper champion!"
~NiteMite~