This is THE BIBLE. This is the gold standard for the exposition of the TCP/IP protocol stack. Every other TCP/IP protocol book must be measured by the yardstick of this book. This is simply the most comprehensive book ever written on the TCP/IP protocol stack. It's crystal clear and utterly lucid. Stevens tome leads the reader logically, methodically and effortlessly through all of the layers of the TCP/IP protocol stack: the Link Layer (ethernet frames), IP layer, Transport Layer etc. All nuances of TCP/IP are discussed: Address Resolution Protocol (ARP), RARP, ICMP, IGMP, User Datagram Protocol, Transmission Control Protocol etc. In particular, the 135 page exposition of the transmission control protocol is a masterstroke. Application level protocols such as DNS, NFS, FTP, SMTP are discussed at length. TCP/IP Illustrated is Unix-centric. Given that the roots of TCP/IP are in Unix, every serious appreciation of the protocol requires at least a basic understanding of Unix philosophy. This book is a masterpiece of technical writing in Computer Science. Do not be mislead by the one negative review of this book on the spurious grounds that it is outdated. The TCP/IP protocol has not changed since the publication of this book in 1994. I have two copies of this book and will probably buy a third copy. I very, very highly recommend TCP/IP Illustrated Volume I.

It is a very good book for understanding TCP/IP protocol suite. It has lots of tools explained in detail to explore the different protocols on unix/linux based systems. Most of the protocols are presented well. It is a must have book for learning networking concepts. I highly recommend this book.

Either if you're a pro or a student, this book is a MUST-HAVE. "Buy it NOW, don't waste more time" is the best advice I could give to you.

This book has very well detailed TCP/IP information, unfortunately some of the information is outdated. The book is easy to follow, and would make an even better learning tool if updated. I bought the book since it was required reading for a class, but I would opt out for a younger publishing on this topic if I had a choice.

This is a good book that covers all the fundamentals of TCP/IP networking. Good illustrations. Seperate chapters for each common application protocols.