CCNA: Cisco Certified Network Associate Study Guide / Edition 5

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Overview

Here's the book you need to prepare for Cisco's CCNA exam, 640-801.

This Study Guide was developed to meet the exacting requirements of today's Cisco certification candidates. In addition to the engaging and accessible instructional approach that has earned author Todd Lammle the "Best Study Guide Author" award in CertCities Readers' Choice Awards for two consecutive years, this updated fifth edition provides:
  • In-depth coverage of every CCNA exam objective
  • Expanded IP addressing and subnetting coverage
  • More detailed information on EIGRP and OSPF
  • Leading-edge exam preparation software

Authoritative coverage of all exam objectives, including:

  • Network planning & designing
  • Implementation & operation
  • LAN and WAN troubleshooting
  • Communications technology


The Cisco Certified Network Associate (CCNA) is the first step to the hottest certification in the internet-working industry. This CCNA study guide maps to Cisco's CCNA training path and provides full coverage of crucial exam topics, including review sections and hundreds of practice questions. The CD contains test-preparation software and informational resources.

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Editorial Reviews

From Barnes & Noble
The Barnes & Noble Review
Todd Lammle’s CCNA Cisco Certification Study Guide, Fifth Edition draws on more independent CCNA preparation expertise than any book we’ve seen.

Lammle begins with an expert introduction to internetworking “the way Cisco wants you to learn it.” This edition contains even more detailed coverage of IP addressing and subnetting: all you need to know to subnet a network “in your head.” You’ll walk through configuring routers, switches, and hosts, as well as planning, implementing, operating, and troubleshooting LANs. You’ll drill down into the details of IP routing and protocols (with newly extended discussions of EIGRP and OSPF). Lammle thoroughly reviews VLANs, WANs, access lists, and especially administration.

There are practice labs in every chapter, sample questions galore, and a CD-ROM packed with goodies (flashcards, PDF e-book, router simulator, and more). This book didn’t become a bestseller by chance. Bill Camarda, from the March 2005 Read Only

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Product Details

  • ISBN-13: 9780782143911
  • Publisher: Wiley, John & Sons, Incorporated
  • Publication date: 1/11/2005
  • Edition number: 5
  • Pages: 720
  • Product dimensions: 7.44 (w) x 9.02 (h) x 1.63 (d)

Meet the Author

Todd Lammle is a world renowned Cisco authority with over fifteen years experience with LANs and WANs. He is president of GlobalNet Systems, a network integration and training firm based in Colorado.
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Read an Excerpt

Chapter 2: Layer-2 Switching

When Cisco discusses switching, they're talking about layer-2 switching unless they say otherwise. Layer-2 switching is the process of using the hardware address of devices on a LAN to segment a network. Since you've got the basic ideas down, I'm now going to focus on the particulars of layer-2 switching and nail down how it works.

Okay, you know that switching breaks up large collision domains into smaller ones, and that a collision domain is a network segment with two or more devices sharing the same bandwidth. A hub network is a typical exam-ple of this type of technology. But since each port on a switch is actually its own collision domain, you can make a much better Ethernet LAN network just by replacing your hubs with switches!

Switches truly have changed the way networks are designed and implemented. If a pure switched design is properly implemented, it absolutely will result in a clean, cost-effective, and resilient internetwork. In this chapter, we'll survey and compare network design before and after switching technologies were introduced.

Routing protocols (such as RIP, which you'll learn about in Chapter 5) have processes for stopping network loops from occurring at the Network layer. However, if you have redundant physical links between your switches, routing protocols won't do a thing to stop loops from occurring at the Data Link layer. That's exactly the reason Spanning Tree Protocol was developed—to put a stop to loops in a layer-2 switched internetwork. The essentials of this vital protocol, as well as how it works within a switched network, are also important subjects this chapter will cover thoroughly.

When frames traverse a switched fabric (or, switched internetwork), the LAN switch type determines how a frame is forwarded to an exit port on a switch. There are three different types of LAN switch methods, and each one handles frames differently as they are forwarded through a switch.This chapter will close with a discussion on the three methods used by Cisco switches.

Before Layer-2 Switching

Let's go back in time a bit and take a look at the condition of networks before switches and how switches have helped segment the corporate LAN. Before LAN switching, the typical network design looked like the network in Figure 2.1.

The design in Figure 2.1 was called a collapsed backbone because all hosts would need to go to the corporate backbone to reach any network services— both LAN and mainframe.

Going back even further, before networks like the one shown in Figure 2.1 had physical segmentation devices like routers and hubs, there was the mainframe network. This network included the mainframe (IBM, Honeywell, Sperry, Dec, etc.), controllers, and dumb terminals that connected into the controller. Any remote sites were connected to the mainframe with bridges.

And then the PC began its rise to stardom, and the mainframe was connected to the Ethernet or to a Token Ring LAN where the servers were installed. These servers were usually O/S 2 or LAN Manager because this was "pre-NT." Each floor of a building ran either coax or twisted-pair wiring to the corporate backbone, and was then connected to a router. PCs ran an emulating software program that allowed them to connect to the mainframe services, giving those PCs the ability to access services from the mainframe and LAN simultaneously. Eventually the PC became robust enough to allow application developers to port applications more effectively than they could ever before—an advance that markedly reduced networking prices and enabled businesses to grow at a much faster rate.

When Novell became more popular in the late 1980s and early 1990s, O/S 2 and LAN Manager servers were by and large replaced with NetWare services. This made the Ethernet network even more popular because that's what Novell 3.x servers used to communicate with client/server software. So that's the story about how the network in Figure 2.1 came into being. There was only one problem…the corporate backbone grew and grew, and as it grew, network services became slower. A big reason for this was that at the same time this huge burst in growth was taking place, LAN services needed even faster service, and the network was becoming totally saturated. Everyone was dumping the Macs and dumb terminals used for the mainframe service in favor of those slick new PCs so they could more easily connect to the corporate backbone and network services.

All this was taking place before the Internet's momentous popularity (Al Gore was still inventing it?), so everyone in the company needed to access the corporate network's services. Why? Because without the Internet, all network services were internal—exclusive to the company network. This created a screaming need to segment that one humongous and plodding corporate network, connected with sluggish old routers. At first, Cisco just created faster routers (no doubt about that), but more segmentation was needed, especially on the Ethernet LANs. The invention of FastEthernet was a very good and helpful thing too, but it didn't address that network seg-mentation need at all.

But devices called bridges did, and they were first used in the network to break up collision domains. Bridges were sorely limited by the amount of ports and other network services they could provide, and that's when layer-2 switches came to the rescue. These switches saved the day by breaking up collision domains on each and every port, and switches could provide hundreds of them! This early, switched LAN looked like the network pictured in Figure 2.2.

Each hub was placed into a switch port, an innovation that vastly improved the network. Now, instead of each building being crammed into the same collision domain, each hub became its own separate collision domain. But there was a catch—switch ports were still very new, and so, unbelievably expensive. Because of that, simply adding a switch into each floor of the building just wasn't going to happen—at least, not yet. Thanks to whomever you choose to thank for these things, the price has dropped dramatically, so now, having every one of your users plugged into a switch port is both good and feasible.

So there it is—if you're going to create a network design and implement it, including switching services are a must. A typical contemporary network design would look something like Figure 2.3, a complete switched network design and implementation.

"But I still see a router in there," you say! Yes…it's not a mirage—there is a router in there. But its job has changed. Instead of performing physical segmentation, it now creates and handles logical segmentation. Those logical segments are called VLANs, and I promise I'll explain them thoroughly— both in the duration of this chapter and in Chapter 6, where they'll be given a starring role.

Switching Services

Layer-2 switching is hardware based, which means it uses the MAC address from the host's NIC cards to filter the network. Unlike bridges that use software to create and manage a filter table, switches use Application-Specific Integrated Circuits (ASICs) to build and maintain their filter tables. But it's still okay to think of a layer-2 switch as a multiport bridge because their basic reason for being is the same—to break up collision domains.

Layer-2 switches and bridges are faster than routers because they don't take up time looking at the Network layer header information. Instead, they look at the frame's hardware addresses before deciding to either forward the frame or drop it....

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Table of Contents

Introduction
Assessment Test
Ch. 1 Internetworking 1
Ch. 2 Layer-2 Switching 75
Ch. 3 Internet Protocols 109
Ch. 4 Introduction to the Cisco IOS 183
Ch. 5 IP Routing 251
Ch. 6 Virtual LANs (VLANs) 319
Ch. 7 Managing a Cisco Internetwork 349
Ch. 8 Configuring Novell IPX 409
Ch. 9 Managing Traffic with Access Lists 463
Ch. 10 Wide Area Networking Protocols 503
App. A Introduction to the Cisco IOS: Hands-on Labs 569
App. B Configuring the Catalyst 1900 Switch 593
App. C Commands in This Study Guide 657
Glossary 669
Index 747
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Customer Reviews

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See All Sort by: Showing 1 – 20 of 25 Customer Reviews
  • Anonymous

    Posted August 30, 2007

    Not the greatest

    It is an okay book to start studying for CCNA with but not the complete bible. It was a bit of disappointment for me. 1. The writer is not methodical, he skips steps. I found asking myself 'how the hell did he get here?' many many times. 2. The software CD the book came with is a blunder. It is a crappiest piece of software. Several commands shown in the book do not work on any of the routers/switches (for ex:int s0/0 did not work on any switch, yet the book mentions it a lot). 3. The writer is poorly organized. 4. Several sections in the book can be well understood if more figures, charts, maps, were included. 5. The publishers have done a terrible job too. If a figure is being referenced frequently, it should be located on the same page or opposing page as the references. I kept flipping pages back and forth to read and look at the figure. This is my pet-peeve about this book.

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  • Anonymous

    Posted December 21, 2005

    The Best for Cisco CCNA study material

    Follows the objectives pretty closely. Passed the exam on the 2nd attempt. The exam is very hard, but this book covers all the basics that you need to know. Add hands-on or routersim.

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  • Anonymous

    Posted December 2, 2004

    It tells you topics won't be on the exam that are on it!!!!

    I read all the way through this book twice before taking the exam, and it specifically says several technologies (for example RIPv2, & NAT, just to name a couple) would not be covered. I showed up on test day and - you guessed it - I had several questions each on these two and other technologies that I chose not to study! I failed the exam by one question, and had to buy the Cisco Press book. A much much better book.

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  • Anonymous

    Posted July 22, 2003

    Pretty Good

    When I started for my CCNA I knew almost nothing about the material. I used this book in conjunction with the Cisco ICND book (Interconnecting Cisco Networking Devices) and got a passing score of 860. Lammle's book was very easy to learn from, and the simulator and practice tests were fairly good. I found his WAN chapter difficult to learn, so I used the WAN chapter in the ICND book. I didn't feel that his practice tests on the CD were very close to the actual exam, so I'd look elsewhere for practice tests if you feel you need more practice.

    Was this review helpful? Yes  No   Report this review
  • Anonymous

    Posted June 23, 2003

    Ace'd the CCNA because of this book

    I passed the CCNA with 1000 out of 1000. This book does an excellent job of clearly explaining the exam essentials. The practice exams in the book are similar to the actual test questions. Flashcards for the PC are very beneficial too.

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  • Anonymous

    Posted April 8, 2003

    Routing Protocols

    If you want to learn IP routing, this book will not take you anywhere close. For that you would need 'Cisco IOS for IP Routing' by Andrew Colton or Doyle's books. However, Lammle's book would probably be all you need to pass the CCNA test. Unless you're a complete beginner, then you may want to add one or two other fine CCNA books.

    Was this review helpful? Yes  No   Report this review
  • Anonymous

    Posted February 11, 2003

    Best book I have ever used!!!

    This book helped me pass the CCNA. It is written for novice users and above and is easy to read. It is direct and down to the point. Plus the testing software that comes with the book is excellent. I would never have been able to pass the CCNA if it weren't for this book. :)

    Was this review helpful? Yes  No   Report this review
  • Anonymous

    Posted October 29, 2002

    This Book has it all

    This book has every thing needed to pass the exam. The labs are very nice. If you really want to knock the exam out, add the CCNA Router Simm and you will pass easily. I passed with a 949, first shot.

    Was this review helpful? Yes  No   Report this review
  • Anonymous

    Posted February 9, 2002

    #1 Choice for the CCNA eXAM

    This book allowed me to pass my CCNA exam with a 903 on the first try. Only 3 weeks of studying and reading the book twice. This book explains all of the neccessary information to learn what it takes to be a CCNA. If you are a perfectionist, though, and want to score 1000, I recommend also reading the Cisco Press book for the extra technical details.

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  • Anonymous

    Posted December 29, 2001

    Extremely well written, although it did miss a few points

    This book does an outstanding all around job explaining the subject matter in plain english. It did miss a few points though, such as supernetting and a better explaination of multicasting. It could also have provided little more info on WAN protocols.

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  • Anonymous

    Posted November 20, 2001

    Good for basics

    I passed the exam with 947 after using this and the official book. This book is not as detailed as the Cisco Press one, but very easy to read. This book should be used 4 the basics n the other one's CD for the exam

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  • Anonymous

    Posted September 20, 2001

    Excellent preparation

    I just passed my CCNA 2.0 test with a score of 924. This book covers everything you need! Along with the virtual lab e-trainer, you will be unstoppable come exam time. Lammle's language is very easy to understand, and his concepts come across easily. A must read for someone looking to break into the Cisco router market!

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  • Anonymous

    Posted September 22, 2001

    Passed CCNA with this book

    Hi! I have given my exam on 13 September 01. Passed my Cisco CCNA exam on my first try with a score of 956. Thanks Todd for writing this book and making CCNA possible to me. I will highly recommend this book. Todd has covered OSI reference model & layered communication, Network protocols, Routing, Network Management, LAN design, Cisco IOS very well. The only weakness in this book is he has to go in more detail on WAN protocol, Bridging & Switcxhing. Hope this will covered on next edition. There are good sample questions which are very similar with the exam. I realy enjoyed the lab session. Hasan Mahmood MCSE, CCNA ASKCCNA@msn.com

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  • Anonymous

    Posted June 20, 2001

    Not what you really need

    I bought this book, hoping to revise the key points that I might have missed using the study guide. But as the exam came near I realized the best way to revise is to go through the study guide yourself and there is no subsitute to it. It highlights the main points but the test is more based on your overall ability. I passed my test with 849 so I would say its your call to buy this book or not

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  • Anonymous

    Posted June 20, 2001

    Passed on first attempt

    Well I work in a company as a networking intern. The only hands on experience I had was upgrading the IOS on switches. I bought this book along with the virtual e-trainer. Didn't study that hard and the last bit on WAN protocols I just read twice, but I passed the Exam with 849 at my first attempt. So I became the third and the youngest certified person in my dept. I would highly reccomend this book and only this book as it covers the topic with enough detail to pass the exam. Others book either over do the details or skip some vital information.

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  • Anonymous

    Posted May 15, 2001

    I'll tell ya after i take the test

    I heard this is one of the best books to use, when preparing for the CCNA. I've been taking Cisco classes for the past two years, but for the past two weeks, i've been preparing for the CCNA test, I take it in 6 days if i pass i'll let you know if the book is good or not.

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  • Anonymous

    Posted February 12, 2001

    Pass with a 946

    Read the book about 4 times from cover to cover and took the practice exams. This book is what you need for the 640--507 test.

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  • Anonymous

    Posted February 19, 2001

    Good study guide for your CCNA exam

    This book is good, contains most material needed for your CCNA exam, is well organied and easy to understand, but be careful with the errors.

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  • Anonymous

    Posted March 8, 2001

    The material that really makes you prepared!!

    Just passed CCNA 2.0 today for the first try with score 946! Ok, I graduated in MS. Computer Eng., but I didn't know what IOS is at that time. Just 2 months later I passed with that impressive score. Only read the book and do all the excercises and labs, you're ready to go!!!

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  • Anonymous

    Posted January 18, 2001

    Excellent book.

    The book covers all the relevant material as well as being very well written. The author is easy to understand and has examples for every IOS command. The questions at the end of each chapter are also excellent practice for the exam.

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