I needed to read this for DeVry course, it is an absolute nightmare. It doesn't describe concepts in an understandable way. It's confusing, and the information is both organized and written poorly. It would be best to skip this book altogether and use online sites such as Wikipedia and Cisco.
This book's title is a false portrayal of what it actually is. I expected a textbook that would clearly introduce new concepts and ease the student into common practices while giving detailed information about the why's and the how's. This is not the case however, as it does no such thing. Unless you're a 20 year systems administrator with a dire need for a refresher course, don't bother.