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Network Warrior 1st Edition

4.5 4.5 out of 5 stars 84 ratings

There is a newer edition of this item:

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Written by networking veteran with 20 years of experience, Network Warrior provides a thorough and practical introduction to the entire network infrastructure, from cabling to the routers. What you need to learn to pass a Cisco certification exam such as CCNA and what you need to know to survive in the real world are two very different things. The strategies that this book offers weren 't on the exam, but they 're exactly what you need to do your job well.

Network Warrior takes you step by step through the world of hubs, switches, firewalls, and more, including ways to troubleshoot a congested network, and when to upgrade and why. Along the way, you 'll gain an historical perspective of various networking features, such as the way Ethernet evolved. Based on the author 's own experience as well as those he worked for and with, Network Warrior is a Cisco-centric book, focused primarily on the TCP/IP protocol and Ethernet networks -- the realm that Cisco Systems now dominates. The book covers:

The type of networks now in use, from LANs, WANs and MANs to CANs



    • The OSI Model and the layers involved in sending data
    • Hubs, repeaters, switches, and trunks in practice
    • Auto negotiation and why it 's a common problem in network slowdowns
    • Route maps, routing protocols, and switching algorithms in Cisco routers
    • The resilient Ethernet -- how to make things truly redundant
    • Cisco 6500 multi-layer switches and the Catalyst 3750 switch
    • Telecom nomenclature -- why it 's different from the data world
    • T1 and DS3
    • Firewall theory, designing access lists, authentication in Cisco devices
    • Server load balancing technology
    • Content switch module in action
    • Designing QOS and what QOS does not do
    • IP design and subnetting made easy




    The book also explains how to sell your ideas to management, how networks become a mess as a company grows, and why change control is your friend.
    Network Warrior will help network administrators and engineers win the complex battles they face every day.

    Amazon First Reads | Editors' picks at exclusive prices

    Editorial Reviews

    Book Description

    Everything you need to know that wasn't on the CCNA exam

    About the Author

    Gary A. Donahue is a working consultant who has been in the computer industry for 25 years. Gary has worked as a programmer, mainframe administrator, Technical Assistance Center engineer, network administrator, network designer, and consultant. Gary has worked as the Director of Network Infrastructure for a national consulting company and has been the president of his own New Jersey consulting company; GAD Technologies.

    Product details

    • Publisher ‏ : ‎ O'Reilly Media; 1st edition (July 1, 2007)
    • Language ‏ : ‎ English
    • Paperback ‏ : ‎ 600 pages
    • ISBN-10 ‏ : ‎ 0596101511
    • ISBN-13 ‏ : ‎ 978-0596101510
    • Item Weight ‏ : ‎ 2.04 pounds
    • Dimensions ‏ : ‎ 7 x 1.34 x 9.19 inches
    • Customer Reviews:
      4.5 4.5 out of 5 stars 84 ratings

    About the author

    Follow authors to get new release updates, plus improved recommendations.
    Gary A. Donahue
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    Gary A. Donahue (GAD) is an author who has been in the computer industry for over 35 years. He has worked as a programmer, mainframe administrator, TAC engineer, network architect, consultant, trainer, and content developer. Gary has also worked as the Director of Network Infrastructure for a national consulting company and was the president of his own New Jersey consulting company; GAD Technology, L.L.C., though he now spends most of his waking hours working for Arista Networks.

    Having spent a great deal of time writing documentation for clients, Gary learned that it was this part of the job that he most enjoyed. After writing a successful book on Networking entitled Network Warrior, he has dedicated much of his free time to writing. In June of 2011, the second edition of Network Warrior hit the shelves, and his latest book, Arista Warrior 2nd Edition goes on sale in June of 2019. Gary has also written Cozy Tales, a book about his beloved Newfoundland dog, which has not yet been picked up by a publisher (http://cozy-tales.com).

    Being a teacher by nature, Gary enjoys the process of imparting information and understanding to others. Gary has taught Tae Kwon Do, Photography and Astronomy both informally and professionally. Being someone who disdains boredom, Gary has many hobbies including amateur radio, astronomy, bicycling, computers of all kinds, gadgets, guitar, hiking, home theater, martial arts, photography, SCUBA diving, chess, and competitive shooting. Many of these hobbies are reflected in the articles written on his sites, http://www.gad.net/Blog/, http://gadsguilds.com, and http://cozy-tales.com.

    Customer reviews

    4.5 out of 5 stars
    4.5 out of 5
    84 global ratings

    Customers say

    Customers find the writing style interesting and quick to explain complex concepts. They also describe the book as a very personal piece of literature and potentially handy for real-time network operators. Readers also say it's the best network book they've read in a long time.

    AI-generated from the text of customer reviews

    Select to learn more
    11 customers mention "Writing style"11 positive0 negative

    Customers find the writing style interesting, informative, and engaging. They also say the author makes the complex concepts easy to read, comprehend, and enjoy. Customers also mention the book is a very personal piece of literature that is potentially handy for real-time network operators.

    "...The text is very engaging, and the author's way of phrasing things is informative and structured yet very flowing and casual...." Read more

    "...Plus digital books make great reference materials, searches take seconds. It's a balance, there is no panacea for all situations...." Read more

    "...'upstream' per say and describes the processes involved in a very easy way to learn.Again, Don't think twice about this book...." Read more

    "...It really is potentially handy for many real-time network operators. One thing I wish the author had spent much more time on is Ethernet switching...." Read more

    4 customers mention "Network book"4 positive0 negative

    Customers find the network book to be the best they've read in a long time.

    "One of the best networking books I have read, period. Not just how it works, but why it works and should be configured...." Read more

    "This book was just what I was looking for! A complete Network guide to assist any Network Administrator! Definitely one to add to your library!" Read more

    "Best Network book I've read in a long time. Ever?..." Read more

    "An Excellent Reference For Any Network Administrator..." Read more

    Top reviews from the United States

    Reviewed in the United States on February 24, 2008
    In preparation for the CCNA exam, I have gone through several networking books, both Cisco-specific and otherwise. I had thought that the official Cisco Press CCNA set was the best resource... until I took a chance on this tome. While I have found the Wendell Odom CCNA set to be the definitive guide to CCNA/CCENT material, I now must admit that this book is nearly - or even exactly - as essential as a CCNA exam prep guide. While the other guides read like textbooks, giving the reader adequate conceptual and theoretical information, this book felt like a nice long chat with a seasoned "network warrior" about real-world, everyday issues faced by network engineers.

    What set this book apart from the thousands of pages (hey, I'm dedicated!) of material I'd already covered?

    - CatOS commands; the new Cisco Press books barely mention that CatOS exists!
    - anecdotes and real-world examples; even if you know how it *should* work, this book reveals how it *does* work
    - objective viewpoint on Cisco technology; no "Cisco's way is the best way" dogma here
    - meaningful discussion of high-end, core-strength equipment; everything in the Wendell Odom set focused exclusively on Catalyst 2960 switches and one model of router
    - frank, direct, humorous, and engaging style; half the material I've covered previously was dreadfully dull
    - illustrations for every concept; this makes my life so much easier when trying to explain things to fellow junior technicians

    While the book may seem daunting at nearly 600 pages, I'm flying through it at about 80-100 pages per day. The text is very engaging, and the author's way of phrasing things is informative and structured yet very flowing and casual. I feel that every chapter contains some point, if not several points and concepts, that I wouldn't have known from the other books out there. What is possibly the best feature of this book is the real-world, realistic approach to every concept and issue. The Cisco Press books seem to assume that the reader will be using 2960 access layer switches running IOS 12.2 or better. Network Warrior does not make this assumption. The author makes the realistic assumption that the reader's network could have all kinds of gear networked together, and thus includes information about CatOS as well as a wide variety of Cisco hardware. Also included are some quick and dirty tricks to save time, money, and effort. For example, I didn't know that I could abbreviate almost any command in IOS ("sho" instead of "show", etc.) and still get the same result until I read this book. While I feel that the by-the-book approach of the Cisco Press material is necessary for building a clear foundation, I feel that this book's get-the-job-done take on networking is a necessary follow-up.

    The book assumes some working knowledge of networking, but not too much. It doesn't explain the bare basics of networking, nor does it give a history lesson about the histories of each and every cabling standard and networking protocol. It's not a total replacement for a book about networking basics, nor a beginner's guide to the CCNA and/or Cisco equipment. What it does instead is reshape one's conception of what a network is and how to manage it. What it does as well, and does excellently, is fill in the gaps that sorely needed filling in the great mass of other Cisco material out there. If you are preparing for the CCNA, or if you have already passed and think you know all you'll need to know about managing Cisco networks, this book was written for you. I guarantee you will learn something new.
    17 people found this helpful
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    Reviewed in the United States on January 1, 2010
    As the back of the book says, "This book begins where certification exams leave off...". I've just stepped off my first real Network Engineering contract job, and is still studying for that elusive CCNA. I have been a Sys Admin for over ten years and I must say - the World of Networks is the "true" IT. I've had a Network + cert for almost a decade, but I was NOT prepared for some of the things required on the real job arena. Some engineers that worked with me didn't yet have their CCNA either, but they knew their stuff.

    If you are studying for a CCNA certification yourself, you have to ask yourself one question - are studying to pass a test, or do you want to learn something? If you want to learn, get a Network Engineering job, or go to a GOOD school. If you want to pass a test, then read the book(s), and study the practice exams. There's no short cuts around either road. This book, by Gary Donahue, promises to bridge that missing link between the classroom and the server room. I haven't read all of it of course (I just got it today), but I had breezed through a digital copy of the book before I actually bought a physical copy from Amazon. This book is 1.25 inches thick and comes with a 45-Day access to the digital version from Safari. However, there just is no comparison between a solid book you can hold in your hands and a digital book. A REAL book is something you can mark with notes and highlights - that's how you can truly own a book.

    But I also live in a small apartment in New York City, so shelve space is also an issue. Plus digital books make great reference materials, searches take seconds. It's a balance, there is no panacea for all situations.

    My order from Amazon.com came in TWO days, and I only chose the FREE Super Saver Shipping option, so I didn't even pay extra. Only the New York sales tax (Arrgh!). I'm very happy with my purchase, and is very pleased with the U.S. government for building the internet for Amazon.com to do business in. I'm giving this book FOUR stars, because there is not even a single mention of "ROLLOVER cable" in it. Yes, I am deliberately being picky.
    2 people found this helpful
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    Reviewed in the United States on February 9, 2010
    I'm keeping this short and sweet. I have the CCNA, CCNP, CCIP, and just passed the CCIE R&S written. Looking back; this book filled in so many gaps for me and this is a must read for anybody who wants to be successful in the Information Technology field.

    The chapters regarding CSU/DSU alarms and what these indicate was such a big help. Stuff you can't learn from Cisco Press books or taking any of their courses. Also, the section where the author breaks down interface errors was massive for me. That section helped me so much in the ISP world when I was getting started in my supporting roles. It's just a wonderful book that answers so many questions and gives you the real picture of how things are implemented on the 'outside'. Not all of us are going to be Network Admins of an intranetwork. This book covers everything you don't see 'upstream' per say and describes the processes involved in a very easy way to learn.

    Again, Don't think twice about this book. This is a must read and it's my favorite of all time. Yes, of all time. It doesn't get any better than this.
    2 people found this helpful
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    Top reviews from other countries

    Aly Doumbia
    5.0 out of 5 stars easy to read
    Reviewed in Canada on May 20, 2020
    great book to have
    Mr. S. Baines
    5.0 out of 5 stars excellent book
    Reviewed in the United Kingdom on July 22, 2009
    The book is waht it says "network warrior". It is easy to read and understand. Certain network knowledge it advisable. But with the examples of what different commands do when aspecs are turned on and off is brilliant. I actually found it very hard to put down, but you have to sleep sometime.
    Logan Cadwallader
    5.0 out of 5 stars Don't wait for the Movie - Read this now.
    Reviewed in Canada on August 1, 2016
    The "Bible" for getting to know your network and what is on it. A must read -again and again..
    StoicCynic
    4.0 out of 5 stars A handy all-round coverage
    Reviewed in the United Kingdom on September 11, 2009
    This book is a very useful thing to have to hand for when your mind goes blank on the basics of something you don't use every day, but also for an overview of something usually neglected in such works: the business liason side of being an IT professional.

    It's very Cisco orientated, but that's no surprise, given Cisco's market penetration, nor is it a terribly bad thing...I suppose it just reflects the way the world is. The only time it really grated on me was regards firewalls and server load balancers, since Cisco's offerings in these spaces suck like a Dyson on steroids (Mr. Donohue's praise for the late, unlamented Local Director series, for example, is very puzzling to me - but each to their own, I guess). However, it would have been nice for it to be a bit more platform-agnostic, I think. Also, BGP gets no more than a passing nod, really, and for that critically important protocol to be dismissed with what boils down to "Well, you probably won't need to config BGP unless you work for an ISP" is a bit weak.

    Apart from that, pretty good.
    7 people found this helpful
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    Mr. M. G. Bancroft
    5.0 out of 5 stars Still brilliant
    Reviewed in the United Kingdom on July 24, 2014
    Indespensable.still.