Even though I had Network+ 2009 version, it was good for life (GFL) and I wanted to pass this newest one to get the "C.E". part. I actually train others in certifications as well.
This certification was "not easy", they all are "not easy" but this one was a bit tricky even for me. DO NOT THINK that it is "easy" no matter what you read on the internet.
I used: CompTIA Network+ N10-007 Exam Cram (6th Edition) by Emmet Dulaney. I have corresponded with the author a few times over the years, and he one of those guys that is not "fake"... really down to earth. And his material I find well written.
Also I used: CompTIA Network+ Certification All-in-One Exam Guide, Seventh Edition (Exam N10-007) 7th Edition by Mike Meyers. I corresponded to Mike a few times in the past, and again.. he's down to earth.. and been around as long as "I" have.. LOL. I like his All-in-one books as they have a real "basic approach.
Professor Messer's videos are a great "visual reference", but you need a good book to go with it.
One thing to note "don't" get wrapped up in the performance based questions! Do them as best as you can and move on. "NO ONE" knows how much one question is worth more then the others.. only CompTIA "does". Get to the multiple choice questions.
Also, don't get worked up in regards to "subnetting". If you find it hard, pay attention to Professor Messer's "Seven Second Subnetting" video on Youtube, and simply understand his first chart of CIDR notation! That's the one to remember well, how many addresses are in per say /25 or /27 ... ect.
Vendor Neutral Certified in IT Project Management, Security, Servers, Workstations, Software, Networking, Windows, Unix and Linux and.. Cloud. :-)