i studied for my 70-270 before the N+ (never even looked at anything to do with the A+) i found the N+ practice tests are really easy..
I could do with knowing more on well known port numbers..
Apart from them the connectors you use are easy to remember. (RJ11, RJ45..ETC)
could just be me though..
Theres a little on the N+ thats tricky but i dont think you will have any problem with it at all.