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Dion guarantees that if you score higher than 80% on his exam, you will be ready for test day. Finally, Dion was one of the few resources that I found that actually included 4-5 PBQ's in all his exams. His exams also include detailed explanations for the correct answers. I found that his questions most closely reflected the difficulty of the Security+ exam. Most people find scoring high on his exams difficult, which made them even better to take. I found his questions challenging, if not more challenging at times, than the actual exam. However, I did purchase his practice exams towards the end of my studying, just so I could familiarize myself with the timed-test environment. While I did not sign up for his full-length Udemy course, I did hear some good reviews about it. Jason Dion is highly reputed in the field of security.
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Lastly, if you just want to use him as a final review, I recommend putting the videos on 1.5x speed to save some time.
HARLEY BENTON TE 80 NT DELUXE SERIES SERIES
Messer also has his own exam review guide and practice exams for an additional cost, but his YouTube series is entirely free! I found him extremely useful in the last few days before my exam when I needed more clarification in my weak areas. The engaging graphics and conversational tone kept the videos from being dry and boring. Whenever I could not understand a term or concept from just reading words in a book, I'd watch a quick video. I used these videos as a supplement to the GCGA book. While the number of videos may seem intimidating, they are reasonably long enough to cover the topics in detail, making sure to not overflow them with excess information. He designed his series with short videos, going in the order of the official exam objectives, which made it extremely easy to follow along. Professor Messer is a widely known resource for Security+ along with some other exams. I cannot stress how useful these videos were in helping me put the topics together.
HARLEY BENTON TE 80 NT DELUXE SERIES PROFESSIONAL
While most textbooks are long and wordy, GCGA is an easy-to-read book with real-life examples from Gibson's professional career in cybersecurity. Gibson does a GREAT job in covering all the relevant objectives, broken up into chapters. Out of everything I used, I would rate this book as my #1 resource, making it a must-buy.
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