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Network Warrior [Kindle Edition]

Gary A. Donahue
4.7 out of 5 stars  See all reviews (55 customer reviews)

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Book Description

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.

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

  • File Size: 5182 KB
  • Print Length: 576 pages
  • Simultaneous Device Usage: Unlimited
  • Publisher: O'Reilly Media; 1 edition (December 17, 2008)
  • Sold by: Amazon Digital Services, Inc.
  • Language: English
  • ASIN: B0026OR2ZO
  • Text-to-Speech: Enabled
  • X-Ray:
  • Word Wise: Not Enabled
  • Lending: Enabled
  • Amazon Best Sellers Rank: #496,456 Paid in Kindle Store (See Top 100 Paid in Kindle Store)
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Customer Reviews

Most Helpful Customer Reviews
102 of 104 people found the following review helpful
5.0 out of 5 stars Maybe the best book I will read in 2007 July 16, 2007
Network Warrior is the best network administration book I've ever read. I spend most of my reading time on security books, but because I lean towards network security I like reading complementary sources on protocols and infrastructure. Gary Donahue has written a wonderful book that I highly recommend for anyone who administers, supports, or interacts with networks. Network Warrior may be the best book I will read in 2007.

Why is Network Warrior so great? I think the key is the author's willingness to share personal recommendations. There are plenty of books about technology and syntax. I've read and reviewed many, most of which I liked for what they offered. However, it's rare to read a network book that says "here's how you should implement this," rather than just list options. I'm at the point in my career where I know what I might do; now I want to know what a real expert would do. Donahue provides that wisdom in many sections, but especially in Part VIII on network design.

A second reason I really enjoyed Network Warrior was its coverage of a variety of Cisco features. Sure, I had read of many of these elsewhere, but I thought Donahue made many of them clear, especially in comparison to each other. There are better references for ACLs, like Cisco Router Firewall Security by Richard Deal, but when ACLs are described next to route maps or VLAN maps, Ciscoland becomes a little easier to understand. Donahue's explanations of EtherChannel, switching algorithms, and autonegotiation are other good examples. I even admit that the author corrected my misunderstanding of QoS, as he says "QoS does not limit bandwidth, it guarantees it, which is not the same thing" (p 429).
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48 of 49 people found the following review helpful
5.0 out of 5 stars The best networking book of 2007!! August 16, 2007
Network Warrior by Gary Donahue may just be the best gem of 2007. I purchased this book solely based on Richard Bejtlich's glowing recommendation. To be honest, I'm typically a little weary of these `all-in-one' books, because it is hard to master `all' areas (not to mention to easily discuss `all' areas). Unquestionably, Mr. Donahue has been able to buck this trend by providing a great resource that answers many questions efficiently and quickly.

To begin with, where does most networking start - layer 2, correct? Concerning NICs and layer 2, most people take auto-negotiation to be (dare I write) plug-n-play. This is the first book I've seen where it discusses `parallel detection'. Donahue is correct on page 20 as stating auto-negotiation is a protocol. He goes on to explain the `why was it built like this' of auto-negotiation. It actually makes sense now. I showed these 2 or 3 pages to a couple of other network engineers, and they both found this information to be both novel and enlightening. Right from the start, I knew I was going to be hooked on this book.

Another gem in this book, this is the first book where I see Dr. Radia Perlman's `Algorhyme' rhyme printed since Perlman's own book. Again, probably stupid, useless info to most, but Donahue gives the foundation for a lot of the topics discussed. The discussion starting on page 207 for the 6500 backplane, Chapter 18 dedicated to the 3750, the section starting on page 156 discussing GRE tunnels and the pits and perils of recursive routing, Content Switch Modules starting on chapter 28 - all topics that are both helpful and well documented in `Network Warrior'.

I could go and on about this book. Overall, this is a great book. I've gone back to it at least 5 times a week since I purchase it last month. I can't imagine a better resource.

I give this book 5 pings out of 5:
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23 of 24 people found the following review helpful
5.0 out of 5 stars Excellent Reference Book December 7, 2007
This book is one of the best reference books about network security you're going to find currently on the market. It covers a wide variety of topics and issues every network administrator will face at one point or another. The author in the typical O'Reilly style also takes great steps to insure the book is not some dry tome, but occasionally puts in light comments to keep your attention. One thing I really liked about this book was its explanations of various parts of networks, how each part works, and steps to take when something fails.

Among topics covered are VLANs, Trunking, Spanning Tree Protocol, routers, tunneling, switches, firewall theory, even chapters on designing networks, all topics that any networking security book should cover and the book's author covers all of these topics well. Also included are examples of screens that you will see while installing a network feature or troubleshooting a problem.

This book is not for the squeamish or the novice, but any network admin will be glad to have it.
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14 of 14 people found the following review helpful
Format:Paperback|Verified Purchase
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.
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Most Recent Customer Reviews
5.0 out of 5 stars awesome
awesome book
Published 2 months ago by James T. Walston Jr.
5.0 out of 5 stars Five Stars
Published 2 months ago by Serge
5.0 out of 5 stars Great resource for both data and voice people.
This an excellent resource for anyone in IT.
Published 4 months ago by Janner
4.0 out of 5 stars Takes it a step further...
If you've studied the CCNA material, this book just takes everything a few steps further. This might be a good book to read if you plan on going forward to the CCNP or other CCNA... Read more
Published 23 months ago by Shifty
5.0 out of 5 stars A must-have resource for the working network professional
This is the most concise and well written networking book I have read to date. Not your typical run of the mill network book which merely regurgitates Cisco code and drawings (and... Read more
Published on September 20, 2012 by G Bradley
5.0 out of 5 stars Awesome Reference
Network Warrior by Gary Donahue does an excellent job of explaining how to troubleshoot and fix a broad range of network problems but more than that he dos so in a way that... Read more
Published on August 23, 2012 by Jeremy S
5.0 out of 5 stars Empirical advice from an expert
I bought this book to get practical knowledge from an expert on networking and Cisco products, and so far many knowledge gaps have been filled. Worth every cent. Read more
Published on March 6, 2012 by Amazon Customer
4.0 out of 5 stars Old (first) edition, but still very good.
The kindle edition of the book is a first edition. The printed version is an updated second edition. Much is left out of the kindle edition (ie IPv6, and Nexus). Read more
Published on February 16, 2012 by Amazon Customer
4.0 out of 5 stars great condition!
The book was shipped in a timely manner and in great condition. The condition of the book was as described and was set at an approriate price.
Published on December 30, 2011 by adrian cruz
5.0 out of 5 stars IT library worthy
This is one of those rare IT books that is worth putting on your library shelf for future reference. It give a very good perspective on protocols and network design. Read more
Published on September 13, 2011 by Amazon Customer
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More About the Author

Gary A. Donahue (GAD) is a working consultant and writer who has been in the computer industry for almost 30 years. Gary has worked as a programmer, mainframe administrator, Technical Assistance Center engineer, network administrator, network designer, and consultant. Gary has also worked as the Director of Network Infrastructure for a national consulting company and is the president of his own New Jersey consulting company; GAD Technology, L.L.C.

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 went on sale in October if 2012. Gary has written Cozy Tales, a book about his beloved Newfoundland dog, which has not yet been picked up by a publisher. He is currently writing another book entitled Tales of a Butter-Licking Ferret-Dog, based on the stories posted in his blog that revolve around life with his dogs.

Being a teacher by nature, Gary enjoys the process of imparting new-found 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 reviews written on his site, Gary is the owner of the Newf-Net Newfoundland Dog forum and is the author of the Newf-L Newfoundland dog F.A.Q.

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