LAN Switching and Wireless, CCNA Exploration Companion Guide [NOOK Book]


LAN Switching and Wireless CCNA Exploration Companion Guide

Wayne Lewis, Ph.D.

LAN Switching and Wireless, CCNA Exploration Companion Guide is the official supplemental textbook for the LAN Switching and Wireless course in the Cisco Networking Academy CCNA® Exploration curriculum version 4. This course provides a comprehensive approach to learning the technologies and protocols needed to design and implement a converged switched network. The ...

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LAN Switching and Wireless, CCNA Exploration Companion Guide

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LAN Switching and Wireless CCNA Exploration Companion Guide

Wayne Lewis, Ph.D.

LAN Switching and Wireless, CCNA Exploration Companion Guide is the official supplemental textbook for the LAN Switching and Wireless course in the Cisco Networking Academy CCNA® Exploration curriculum version 4. This course provides a comprehensive approach to learning the technologies and protocols needed to design and implement a converged switched network. The Companion Guide, written and edited by a Networking Academy instructor, is designed as a portable desk reference to use anytime, anywhere. The book’s features reinforce the material in the course to help you focus on important concepts and organize your study time for exams.

New and improved features help you study and succeed in this course:

  • Chapter objectives: Review core concepts by answering the questions listed at the beginning of each chapter.
  • Key terms: Refer to the updated lists of networking vocabulary introduced and turn to the highlighted terms in context in each chapter.
  • Glossary: Consult the all-new comprehensive glossary with more than 190 terms.
  • Check Your Understanding questions and answer key: Evaluate your readiness with the updated end-of-chapter questions that match the style of questions you see on the online course quizzes. The answer key explains each answer.
  • Challenge questions and activities: Strive to ace more challenging review questions and activities designed to prepare you for the complex styles of questions you might see on the CCNA exam. The answer key explains each answer.

Wayne Lewis is the Cisco Academy Manager for the Pacific Center for Advanced Technology Training (PCATT), based at Honolulu Community College.

How To: Look for this icon to study the steps that you need to learn to perform certain tasks.

Packet Tracer Activities: Explore networking concepts in activities interspersed throughout some chapters using Packet Tracer v4.1 developed by Cisco. The files for these activities are on the accompanying CD-ROM.

Also available for the LAN Switching and Wireless course:

LAN Switching and Wireless, CCNA Exploration Labs and Study Guide

ISBN-10: 1-58713-202-8

ISBN-13: 978-1-58713-202-5

Companion CD-ROM

**See instructions within the ebook on how to get access to the files from the CD-ROM that accompanies this print book.**

The CD-ROM provides many useful tools and information to support your education:

  • Packet Tracer Activity exercise files
  • A Guide to Using a Networker’s Journal booklet
  • Taking Notes: A .txt file of the chapter objectives
  • More IT Career Information
  • Tips on Lifelong Learning in Networking

This book is part of the Cisco Networking Academy Series from Cisco Press®. Books in this series support and complement the Cisco Networking online curriculum.

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Product Details

  • ISBN-13: 9780132877473
  • Publisher: Pearson Education
  • Publication date: 5/12/2008
  • Series: Companion Guide
  • Sold by: Barnes & Noble
  • Format: eBook
  • Edition number: 1
  • Pages: 528
  • Sales rank: 1,065,361
  • File size: 26 MB
  • Note: This product may take a few minutes to download.

Meet the Author

Wayne Lewis is the Cisco Academy Manager for the Pacific Center for Advanced Technology Training (PCATT), based at Honolulu Community College (HonCC), and the Legal Main Contact for the CCNA/CCNP/Network Security Cisco Academy Training Center at PCATT/HonCC. Since 1998, Wayne has taught routing and switching, wide area networking, network troubleshooting, network security, wireless networking, IP telephony, and quality of service to instructors from universities, colleges, and high schools in

Australia, Canada, Mexico, Central America, South America, United States, American Samoa, Guam, China, Hong Kong, Taiwan, Indonesia, Singapore, Korea, Japan, Italy, Germany, Netherlands, Sweden, Poland, Hungary, and Great Britain, both onsite and at PCATT/HonCC. Cisco has sent Wayne to several countries to conduct inaugural Networking Academy teacher-training sessions to certify the initial cohorts of instructors and kick off the training centers for these countries. Before teaching networking, Wayne began teaching

at age 20 at Wichita State University, followed by the University of Hawaii and HonCC. In 1992, Wayne received a Ph.D. in math, specializing in finite rank torsion-free modules over a Dedekind domain; he now works on algebraic number theory research in his spare time. Wayne works as a contractor for Cisco , performing project management for the development of network security, CCNA, and CCNP curriculum. He and his wife, Leslie, also run a network consulting company. Wayne enjoys surfing the South Shore of Oahu in

the summer and surfing big waves on the North Shore in the winter.

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Table of Contents

&atext-align=left align=left>Chapter 1 LAN Design 1

Objectives 1

Key Terms 1

Switched LAN Architecture 2

The Hierarchical Network Model 2

Access Layer 2

Distribution Layer 3

Core Layer 3

A Hierarchical Network in a Medium-Sized Business 4

Benefits of a Hierarchical Network 4

Principles of Hierarchical Network Design 6

Network Diameter 7

Bandwidth Aggregation 8

Redundancy 9

What Is a Converged Network? 10

Legacy Equipment 10

Advanced Technology 11

New Options 12

Separate Voice, Video, and Data Networks 13

Matching Switches to Specific LAN Functions 15

Considerations for Hierarchical Network Switches 15

Traffic Flow Analysis 15

User Community Analysis 17

Data Stores and Data Servers Analysis 19

Topology Diagrams 20

Switch Features 22

Switch Form Factors 22

Switch Performance 24

Power over Ethernet and Layer 3 Functionality 26

Switch Features in a Hierarchical Network 28

Access Layer Switch Features 28

Distribution Layer Switch Features 30

Core Layer Switch Features 31

Switches for Small and Medium Sized Business (SMB) 33

Catalyst Express 500 33

Catalyst 2960 34

Catalyst 3560 35

Catalyst 3750 36

Catalyst 4500 36

Catalyst 4900 37

Catalyst 6500 38

Comparing Switches 39

Summary 40

Labs 40

Check Your Understanding 41

Challenge Questions and Activities 44

Chapter 2 Basic Switch Concepts and Configuration 45

Objectives 45

Key Terms 45

Introduction to Ethernet/802.3 LANs 46

Key Elements of Ethernet/802.3 Networks 46


Ethernet Communications 47

Duplex Settings 49

Switch Port Settings 50

Switch MAC Address Table 51

Design Considerations for Ethernet/802.3 Networks 52

Bandwidth and Throughput 52

Collision Domains 53

Broadcast Domains 54

Network Latency 54

Network Congestion 55

LAN Segmentation 55

LAN Design Considerations 56

Forwarding Frames Using a Switch 58

Switch Forwarding Methods 59

Symmetric and Asymmetric Switching 60

Memory Buffering 60

Layer 2 and Layer 3 Switching 62

Switch Management Configuration 63

Navigating Command-Line Interface Modes 63

GUI-Based Alternatives to the CLI 65

Using the Help Facility 68

Accessing the Command History 70

Switch Boot Sequence 71

Prepare to Configure the Switch 72

Basic Switch Configuration 72

Management Interface 73

Default Gateway 74

Duplex and Speed 75

HTTP Access 76

MAC Address Table Management 77

Verifying Switch Configuration 78

Basic Switch Management 80

Backing Up and Restoring Switch Configuration Files 80

Using a TFTP Server with Switch Configuration Files 82

Clearing Switch Configuration Information 84

Configuring Switch Security 85

Configuring Password Options 85

Securing Console Access 85

Securing Virtual Terminal Access 87

Securing Privileged EXEC Access 88

Encrypting Switch Passwords 89

Password Recovery 90

Login Banners 92

Configure Telnet and SSH 93

Configuring Telnet 93

Configuring SSH 94

Common Security Attacks 96

MAC Address Flooding 96

Spoofing Attacks 100

CDP Attacks 101

Telnet Attacks 102

Security Tools 103

Configuring Port Security 105

Securing Unused Ports 110

Summary 111

Labs 111

Check Your Understanding 112

Challenge Questions and Activities 117

Chapter 3 VLANs 121

Objectives 121

Key Terms 121

Introducing VLANs 122

Defining VLANs 122

Benefits of VLANs 124

VLAN ID Ranges 126

Types of VLANs 126

Voice VLANs 131

Network Application Traffic Types 133

Switch Port Membership Modes 136

Controlling Broadcast Domains with VLANs 138

VLAN Trunking 143

VLAN Trunks 144

IEEE 802.1Q Frame Tagging 145

Native VLANs 147

Trunking Operation 148

Trunking Modes 149

Configure VLANs and Trunks 151

Configure a VLAN 152

Managing VLANs 155

Managing VLAN Memberships 158

Configure a Trunk 160

Troubleshooting VLANs and Trunks 164

Common Problems with Trunks 165

A Common Problem with VLAN Configurations 171

Summary 173

Labs 173

Check Your Understanding 174

Challenge Questions and Activities 178

Chapter 4 VTP 181

Objectives 181

Key Terms 181

VTP Concepts 182

What Is VTP? 182

Benefits of VTP 184

VTP Components 184

VTP Operation 186

Default VTP Configuration 186

VTP Domains 188

VTP Advertising 190

VTP Configuration Revision Number 192

VTP Advertisement Types 193

VTP Modes 197

VTP Server-to-Client Behavior 198

VTP Server-to-Transparent-to-Client Behavior 199

VTP Pruning 201

VTP Pruning in Action 202

Configure VTP 204

Configuring VTP 204

Steps to Configuring VTP 206

Troubleshooting VTP Configurations 212

Incompatible VTP Versions 212

VTP Password Issues 212

Incorrect VTP Domain Name 213

All Switches Set to VTP Client Mode 214

VTP Troubleshooting Example 215

Managing VLANs on a VTP Server 217

Summary 219

Labs 219

Check Your Understanding 220

Challenge Questions and Activities 224

Chapter 5 STP 227

Objectives 227

Key Terms 227

Redundant Layer 2 Topologies 229

Redundancy 229

Issues with Redundancy 234

Broadcast Storms 238

Duplicate Unicast Frames 240

Real-World Redundancy Issues 241

Loops in the Wiring Closet 242

Loops in Cubicles 243

Introduction to STP 244

Spanning-Tree Algorithm (STA) 244

STP Topology 245

Port Types in the Spanning-Tree Algorithm 247

Root Bridge 248

Best Paths 249


BPDU Process 253

Bridge ID 258

Configure and Verify the BID 261

Port Roles 263

Configure Port Priority 265

Port Role Decisions 266

STP Port States and BPDU Timers 268

Cisco PortFast 271

STP Convergence 273

Step 1. Elect a Root Bridge 273

Verify Root Bridge Election 274

Step 2. Elect Root Ports 276

Verify Root Port Election 278

Step 3. Elect Designated and Nondesignated Ports 279

Verify Designated and Nondesignated Port Election 283

STP Topology Change 285

PVST+, RSTP, and Rapid PVST+ 286

Cisco and IEEE STP Variants 287

Per-VLAN Spanning-Tree (PVST) Overview 287

Per-VLAN Spanning-Tree Plus (PVST+) Overview 287

Rapid Spanning-Tree Protocol (RSTP) Overview 288

Multiple Spanning-Tree Protocol (MSTP) Overview 288

PVST+ 288

Configure PVST+ 291

RSTP 294


Edge Ports 296

Link Types 297

RSTP Port States and Port Roles 298

RSTP Proposal and Agreement Process 301

Configuring Rapid PVST+ 309

Design STP for Trouble Avoidance 312

Minimize the Number of Blocked Ports 313

Use Layer 3 Switching 314

Keep STP Even if It Is Unnecessary 316

Keep Traffic off of the Management VLAN 316

Troubleshoot STP Operation 316

PortFast Configuration Error 317

Network Diameter Issues 318

Summary 320

Labs 320

Check Your Understanding 321

Challenge Questions and Activities 327

Chapter 6 Inter-VLAN Routing 331

Objectives 331

Key Terms 331

Inter-VLAN Routing 332

Introducing Inter-VLAN Routing 332

One-Router-Interface-per-VLAN 332

Router-on-a-Stick 334

Layer 3 Switch 336

Interfaces and Subinterfaces 337

One-Router-Interface-per-VLAN 338

Router-on-a-Stick 341

Considerations for Inter-VLAN Routing Methods 345

Configuring Inter-VLAN Routing 347

Configure Inter-VLAN Routing 347

Configure Router-on-a-Stick Inter-VLAN Routing 351

Troubleshooting Inter-VLAN Routing 356

Switch Configuration Issues 356

Switch Cisco IOS Commands for Troubleshooting 359

Router Configuration Issues 360

Router Cisco IOS Commands for Troubleshooting 361

IP Addressing Issues 362

IP Addressing Cisco IOS Verification Commands 364

Summary 366

Labs 366

Check Your Understanding 367

Challenge Questions and Activities 373

Chapter 7 Basic Wireless Concepts and Configuration 377

Objectives 377

Key Terms 377

The Wireless LAN 379

Why Use Wireless? 379

Wireless LANs 380

Comparing a WLAN to a LAN 381

Wireless LAN Components 383

Wireless LAN Standards 383

Wi-Fi Certification 386

Wireless Infrastructure Components 387

Wireless NICs 387

Wireless Access Points 388

Wireless Routers 390

Wireless Operation 391

Configurable Wireless Parameters 391

Wireless Topologies 393

Wireless Association 396

Planning the Wireless LAN 399

Wireless LAN Security 402

Threats to Wireless Security 402

Rogue Access Points 402

Man-in-the-Middle Attacks 403

Denial of Service 404

Wireless Security Protocols 405

Authenticating the Wireless LAN 407

Wireless Encryption 408

Controlling Access to the WLAN 409

Configure Wireless LAN Access 410

Configuring the Wireless Access Point 410

Configuring Basic Wireless Settings 413

Configuring Wireless Security 415

Configuring a Wireless NIC 418

Scan for SSIDs 418

Select the Wireless Security Protocol 420

Verify Connectivity to the WLAN 423

Troubleshooting Simple WLAN Problems 424

A Systematic Approach to WLAN Troubleshooting 424

Solve Access Point Radio and Firmware Issues 426

Channel Settings 426

RF Interference 429

Access Point Placement 431

Authentication and Encryption 434

Summary 436

Labs 436

Check Your Understanding 437

Challenge Questions and Activities 441

Appendix Check Your Understanding and Challenge Questions

Answer Key 445

Glossary 461

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Sort by: Showing all of 3 Customer Reviews
  • Anonymous

    Posted June 20, 2008

    A reviewer

    This book mainly focuses on the Switching and Wireless concepts of the CCNA Exam. As a CCNA you will be expected to know how VLANs work, the different types of VLANs, configuring VLANs, inter-vlan routing, VTP, STP, and wireless concepts. This book does a nice job explaining all of these concepts and making them easy to understand! The diagrams/pictures in each chapter were really explained well and helped me understand the concepts. The summary at the end of each chapter helped me review all that I had read in the chapter. The quizzes at the end of each chapter also helped me go back and review the concepts that I didn't understand. There were also challenging questions and activities at the end of each chapter that really tested my understanding of the concepts that I learned. The key terms were listed on the front of each chapter, and I found it convenient because I could flip back to the glossary and look up whatever definition I was unfamiliar with. After studying the chapters through this book, I now have the knowledge of all the CCNA level switching concepts and the basic wireless concepts. The activities in each chapter helped me learn how to configure VLANs, VTP, STP, and inter-vlan routing. You must purchase the LAN Switching Wireless Labs to go with it! It gives you the hands on experience that you need.

    2 out of 2 people found this review helpful.

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  • Posted March 29, 2012

    more from this reviewer

    The book is meant to let you pass the corresponding Cisco switch

    The book is meant to let you pass the corresponding Cisco switching exam. For this ends, it furnishes a good and comprehensive discussion of the subject. The equipment covered is naturally Cisco's. Typically the text describes steps you take at the command terminal hooked up to a switch. Ah, but one very important case emphasised is the remote access of the switch, using a virtual terminal (vty). Naturally, a cracker could break in across the network. So you need to secure all the vty lines.

    A key idea is the privileged EXEC mode. Once a user gets that, she can configure anything on the switch. It seems that earlier verions of the switch stored the password to EXEC in a readable text string inside a startup configuration file. So someone who could read that file could ascend to EXEC at a later time. Hmm! While the book does not outright admit it, this was a flaw in those earlier operating systems. To anyone experienced with computers, and not necessarily with switches in particular, this part of the text comes across clearly. Anyway, Cisco upped its game. Now there is an option to encrypt the password. Wonder why it took so long?

    Another major idea in the book is the virtual LAN [VLAN]. You can have multiple IP networks on the same switching network. It gives tremendous flexibility when your company or organisation has disparate subgroups with different needs. This is one of the important sections of the text. Because regardless of passing the exam, if you have to administer a real world network, being able to make VLANs can greatly improve the performance and security of your overall network.

    The text goes on to show how to perform routing between 2 or more VLANs. More complex administration but the task will be inevitable if you have to set up several VLANs.

    Separate from all the above is the last section of the book, on running a wireless LAN. The discussion here is quite good, with well drawn diagrams that illustrate frequent geographical or topological issues when deploying a wireless access point or router. You can also anticipate that maintaining such a router will be a common chore. The book cautions that the intrinsic wireless nature of the LAN means that it can be more vulnerable to attacks, since the attacker does not need to physically attach to a wired network. In turn, the latter means that the attacker can be outside a home or office or coffeehouse, within which the only access to that LAN is meant to occur.

    From the text, it appears that the administrative tasks for a wireless LAN are simpler than running a VLAN on a wired network.

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

    Posted May 5, 2010

    No text was provided for this review.

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