I got this book as a crash course to do my CCNA certification, and because I know some networking through another Network+ study guides, I realise this book has too much errors.
The diagrams in pages 146, and 148, is the same where it should be different, (I actually verified it with my friend who is a CCNP). The text in page 147 is totaly misleading to Diagram 7.2 in page 146. It seem obervious that the author was working on a totaly different diagram. In page 185, the answer the the quiz question 4 is 120.0.0.1, which is incorrect, it should be 127.0.0.1. If you are an absolute beginner, you have no idea this has got to do with the TCP/IP loopback testing. The errata notes for this book is still not out yet.
Otherwise is book is still okay for someone like me who can actually point out the errors. So in subtracting the errors, this book is worth the read without any insurance. For insurance , find someone who is certified, like my CCNP friend, or perhaps get another textbook where the errata notes are available.
Ain't worth the read, if you ain't got knowledge