This might have been the second O'Reilly book I ever read. I was making my way, breaking my teeth, in my Information Technology career. When I read this book, I did not understand a damn thing! That is not to say the book is bad. In fact, the guys I worked for recommended it, and they knew this stuff backwards, forwards, sideways, and every which way. So, as I said, the fact that I did not understand it does not reflect on the book. ( )

An excellent reference on the Domain Name System but the writing can be a bit dense at times. ( )