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This seems to be a decent book. I wish the author covered more on advanced topics, like Ch 16. I have to admit I was disappointed to see things like, "this is a switch" and "this is what a router does." If you don't know what a router is, you should probably be starting with a different book. While I can understand why authors include this type of information, to sell more books, I appreciate authors that can target their books to a specific and not as general audience. Just my .02.
Dry but gets the job done, you want a solid basis in TCPIP and networking generally prior to picking this one up but its accurate and sets the foundation pretty well if you are moving into this field and enjoy the challenge it presents.