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CCNA Wireless Official Exam Certification Guide

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Table of Contents

Foreword xix Introduction xx Part I Wireless LAN Fundamentals 2 Chapter 1 Introduction to Wireless Networking Concepts 5 "Do I Know This Already?" Quiz 5 Foundation Topics 8 Wireless Local-Area Networks 8 How Bandwidth Is Achieved from RF Signals 8 Unlicensed Frequency Bands Used in WLANs 9 900 MHz 11 2.4 GHz 11 5 GHz 12 Modulation Techniques and How They Work 12 DSSS 12 MIMO 16 Dynamic Rate Shifting 17 Sending Data Using CSMA/CA 17 Exam Preparation Tasks 18 Review All Key Concepts 18 Complete the Tables and Lists from Memory 18 Definition of Key Terms 18 Chapter 2 Standards Bodies 21 "Do I Know This Already?" Quiz 21 Foundation Topics 24 Wireless Standards and Regulatory Committees 24 FCC 24 ETSI 25 IEEE 27 Wi-Fi Certification 27 Exam Preparation Tasks 28 Review All the Key Topics 28 Complete the Tables and Lists from Memory 28 Definition of Key Terms 28 Chapter 3 WLAN RF Principles 31 "Do I Know This Already?" Quiz 31 Foundation Topics 34 Characteristics of Wireless Networks 34 Review of Wavelength 34 Review of Frequency 34 Review of Amplitude 35 What Is Effective Isotropic Radiated Power? 35 Influences on Wireless Transmissions 35 Understanding the Free Path Loss Model 35 Understanding Absorption 36 Understanding Reflection 38 Understanding Multipath 39 Understanding Scattering 39 Understanding Refraction 40 Understanding Line of Sight 41 Determining Signal Strength Influences 42 The Fresnel Zone 42 Received Signal Strength Indicator 42 Signal-to-Noise Ratio 43 Link Budget 44 Exam Preparation Tasks 45 Review All Key Concepts 45 Definition of Key Terms 45 Chapter 4 WLAN Technologies and Topologies 47 "Do I Know This Already?" Quiz 47 Foundation Topics 52 General Wireless Topologies 52 WPAN 52 WLAN 53 WMAN 54 WWAN 54 Original 802.11 Topologies 55 Overview of Ad Hoc Networks 55 Network Infrastructure Mode 55 Service Set Identifiers 58 Vendor-Specific Topology Extensions 59 Workgroup Bridges 59 Repeaters 60 Outdoor Wireless Bridges 61 Outdoor Mesh Networks 62 Exam Preparation Tasks 64 Review All the Key Topics 64 Definition of Key Terms 64 Chapter 5 Antenna Communications 67 "Do I Know This Already?" Quiz 67 Foundation Topics 71 Principles of Antennas 71 Polarization 71 Diversity 71 Common Antenna Types 73 Omnidirectional Antennas 73 Directional Antennas 79 Antenna Connectors and Hardware 89 Attenuators 89 Amplifiers 89 Lightning Arrestors 89 Splitters 90 Exam Preparation Tasks 91 Review All the Key Topics 91 Complete the Tables and Lists from Memory 91 Definition of Key Terms 91 References in This Chapter 92 Chapter 6 Overview of the 802.11 WLAN Protocols 95 "Do I Know This Already?" Quiz 95 Foundation Topics 100 The 802.11 Protocol Family Overview 100 The Original 802.11 Protocol 100 The 802.11b Protocol 100 The 802.11g Protocol 101 How 802.11g Interacts with 802.11b 102 The 802.11a Protocol 106 802.11a Power Requirements 107 The 802.11n Protocol 108 Sending Frames 109 Antenna Considerations 109 Exam Preparation Tasks 110 Review All Key Concepts 110 Complete the Tables and Lists from Memory 110 Definition of Key Terms 110 End Notes 110 Chapter 7 Wireless Traffic Flow and AP Discovery 113 "Do I Know This Already?" Quiz 113 Foundation Topics 116 Wireless Frame Transmission 116 Wireless Frame Types 116 Sending a Frame 116 Wireless Frame Headers 118 Frame Types 120 Management Frames 121 Control Frames 123 Power Save Mode and Frame Types 124 Frame Speeds 125 A Wireless Connection 125 Exam Preparation Tasks 129 Review All the Key Concepts 129 Complete the Tables and Lists from Memory 129 Definition of Key Terms 129 Chapter 8 Additional Wireless Technologies 131 "Do I Know This Already?" Quiz 131 Foundation Topics 134 Cordless Phones 134 Bluetooth 135 ZigBee 135 WiMax 138 Other Types of Interference 140 Exam Preparation Tasks 141 Review All the Key Topics 141 Definition of Key Terms 141 Endnotes 141 References in This Chapter 141 Chapter 9 Delivering Packets from the Wireless to Wired Network 143 "Do I Know This Already?" Quiz 143 Foundation Topics 147 The Wireless Network Road Trip 147 The Association Process 147 Sending to a Host on Another Subnet 148 Using VLANs to Add Control 153 VLAN Membership Modes 154 Configuring VLANs and Trunks 155 Creating VLANs 156 Assigning Ports to a VLAN 158 Creating Trunk Ports 159 Exam Preparation Tasks 162 Review All the Key Topics 162 Complete the Tables and Lists from Memory 162 Definition of Key Terms 163 Command References to Check Your Memory 163 End Notes 163 Part II Cisco Wireless LANs 164 Chapter 10 Cisco Wireless Networks Architecture 167 "Do I Know This Already?" Quiz 167 Foundation Topics 171 The Need for Centralized Control 171 The Cisco Solution 171 APs in the CUWN 172 WLCs in the CUWN 172 Features of the Cisco Controllers 172 Supporting Multiple Networks 173 The CUWN Architecture 174 Client Devices 176 Access Points 176 The 1130AG 177 The 1240AG 178 The 1250 Series AP 178 The 1300 Series AP/Bridge 179 The 1400 Series Wireless Bridge 180 Cisco Access Point Summary 180 Wireless LAN Controllers 181 The Cisco 44xx Series WLC 182 The 3750-G WLC 182 The Cisco 2106 WLC 183 The Cisco WLCM 184 Wireless LAN Controller Summary 185 Wireless Network Management 185 Exam Preparation Tasks 187 Review All the Key Topics 187 Complete the Tables and Lists from Memory 187 Definition of Key Terms 187 References 187 Chapter 11 Controller Discovery and Association 189 "Do I Know This Already?" Quiz 189 Foundation Topics 192 Understanding the Different LWAPP Modes 192 LWAPP Layer 2 Transport Mode 193 LWAPP Layer 3 Transport Mode 194 How an LWAPP AP Discovers a Controller 196 How an LWAPP AP Chooses a Controller and Joins It 197 How an LWAPP AP Receives Its Configuration 200 Redundancy for APs and Controllers 201 The AP Is Joined, Now What? 202 Local Mode 203 Monitor Mode 203 Sniffer Mode 203 Rogue Detection Mode 203 H-REAP Mode 204 Bridge Mode 204 Exam Preparation Tasks 205 Review All the Key Topics 205 Definition of Key Terms 205 Chapter 12 Adding Mobility with Roaming 207 "Do I Know This Already?" Quiz 207 Foundation Topics 210 Understanding Roaming 210 Understanding Mobility Groups 210 Types of Roaming 212 The Layer 2 Roaming Process 215 The Layer 3 Roaming Process 216 Exam Preparation Tasks 221 Review All the Key Topics 221 Definition of Key Terms 221 Chapter 13 Simple Network Configuration and Monitoring with the Cisco Controller 223 "Do I Know This Already?" Quiz 223 Foundation Topics 228 Controller Terminology 228 Dynamic Interfaces 228 Static Interfaces 229 Connecting to the Controller 230 Controller Boot Sequence 230 Performing Initial CLI Configurations 232 Performing Initial Web Configurations 235 Navigating the Web Interface of the Controller 235 Configuring the Controller Using the Web Interface 238 Building the Controller Interface 238 Creating the WLAN and Tying It to the Interface 240 Modifying the Security Settings 242 Naming Access Points 243 Restricting Access to Access Points 245 Summary of Controller Configuration Using the Web Interface 247 Monitoring with the Controller 247 General Monitoring 248 Managing Rogue APs 253 Managing Clients 256 Using Internal DHCP 257 Exam Preparation Tasks 259 Review All the Key Topics 259 Definition of Key Terms 259 Chapter 14 Migrating Standalone APs to LWAPP 261 "Do I Know This Already?" Quiz 261 Foundation Topics 264 Connecting to a Standalone AP 264 Accessing the AP in Autonomous Mode 264 Using the Express Setup and Express Security for Basic Configuration 265 Working with the Web Interface 267 Converting to LWAPP 269 Converting to LWAPP Using the IOS-to-LWAPP Conversion Utility 269 Exam Preparation Tasks 275 Review All the Key Topics 275 Definition of Key Terms 275 Chapter 15 Cisco Mobility Express 277 "Do I Know This Already?" Quiz 277 Foundation Topics 280 Overview of the Small Business Communication System 280 521 AP 281 526 Wireless Express Controller 281 Comparing the Cisco Mobility Express Architecture to the CUWN 282 Configuring the 521 AP and 526 Controller 282 Using the CLI to Configure the Controller 282 Using the Web Browser to Configure the Controller 287 Using the Cisco Configuration Assistant 288 Exam Preparation Tasks 292 Review All the Key Topics 292 Definition of Key Terms 292 References 292 Chapter 16 Wireless Clients 295 "Do I Know This Already?" Quiz 295 Foundation Topics 298 Using Windows to Connect to a Wireless LAN 298 Configuring a Profile 298 How the WZC Tool Works 300 Using a Mac to Connect to a Wireless LAN 301 Configuring a Profile 301 How the AirPort Extreme Tool Works 302 Using Linux to Connect to a Wireless LAN 304 Configuring a Profile 305 How the NetworkManager Tool Works 306 Using the ADU to Connect to a Wireless LAN 307 Cisco Wireless LAN Adapters 307 Installing the ADU 308 Configuring a Profile 310 Connecting to Preferred Networks 311 Manually Creating a Profile 312 Managing Profiles 315 Using Diagnostic Tools 315 The ACAU 319 The Cisco Secure Services Client 320 Licensing 320 Installation 321 Configuring Profiles 321 SSC Groups 322 SSCAU Overview 322 The Cisco Client Extension Program 322 Exam Preparation Tasks 323 Review All the Key Topics 323 Complete the Tables and Lists from Memeory 323 Definition of Key Terms 323 Part III WLAN Maintenance and Administration 324 Chapter 17 Securing the Wireless Network 327 "Do I Know This Already?" Quiz 327 Foundation Topics 331 Threats to Wireless Networks 331 Ad Hoc Networks 331 Rogue APs 331 Client Misassociation 331 Management Frame Protection 332 Wireless Attacks 332 Simple Authentications 334 Open Authentication 334 Preshared Key Authentication with Wired Equivalent Privacy 334 MAC Address Filtering 336 Centralized Authentication 336 802.1x and How It Is Used 338 The EAP Process 340 The Authentication Server 340 EAP-TLS 342 EAP-FAST 343 PEAP 344 LEAP 345 Authentication and Encryption 345 WPA Overview 346 WPA2 Overview 347 Exam Preparation Tasks 350 Review All the Key Topics 350 Complete the Tables and Lists from Memeory 350 Definition of Key Terms 351 References 351 Chapter 18 Enterprise Wireless Management with the WCS and the Location Appliance 353 "Do I Know This Already?" Quiz 353 Foundation Topics 358 Introduction to the WCS 358 Installing and Configuring the WCS 358 Administration Options in the WCS 360 Adding Controllers to the WCS 362 Working with Templates 364 Auto Provisioning 367 Maps and APs in the WCS 368 Planning Mode 372 Monitoring with the WCS 376 Exam Preparation Tasks 378 Review All the Key Topics 378 Complete the Tables and Lists from Memeory 378 Definition of Key Terms 379 References 379 Chapter 19 Maintaining Wireless Networks 381 "Do I Know This Already?" Quiz 381 Foundation Topics 386 Upgrading a Controller 386 Controller Upgrade Approaches 388 Upgrade Using WCS 390 Upgrading an AP 391 Upgrading WCS 392 Managing Configurations 392 Working with AP Configuration Files 398 Resetting the Controller to the Defaults 398 Exam Preparation Tasks 400 Review All the Key Topics 400 Definition of Key Terms 400 References 400 Chapter 20 Troubleshooting Wireless Networks 403 "Do I Know This Already?" Quiz 403 Foundation Topics 408 Physical Connections and LEDs 408 Common Client-Side Issues 408 Using the CLI to Troubleshoot 410 Using the Controller Interface 417 Using the Controller Logs 418 Using SNMP 420 Configuring the Community Strings 421 Using Tech Support 422 Using WCS Version 5.x to Troubleshoot Clients 423 Using the Cisco Spectrum Expert 423 Exam Preparation Tasks 426 Review All the Key Topics 426 Complete the Tables and Lists from Memeory 426 Definition of Key Terms 427 References 427 Part IV Final Preparation 428 Chapter 21 Final Preparation 431 Tools for Final Preparation 431 Exam Engine and Questions on the CD 431 Install the Software from the CD 432 Activate and Download the Practice Exam 432 Activating Other Exams 433 Cisco Learning Network 433 Study Plan 433 Recall the Facts 434 Practice Configurations 434 Use the Exam Engine 435 Choosing Study or Simulation Mode 435 Passing Scores for the Cisco CCNA Wireless Exams 435 Part V Appendixes 436 Appendix A Answers to the "Do I Know This Already?" Quizzes 438 Appendix B Memory Tables (on the CD only) Appendix C Memory Tables Answer Key (on the CD only) Glossary 450 Index 464

About the Author

Brandon James Carroll is one of the country's leading instructors for Cisco security technologies, teaching classes that include the CCNA, CCNP, CCSP courses, a number of the CCVP courses, as well as custom developed courseware. In his 6 years with Ascolta, Brandon has developed and taught many private Cisco courses for companies such as Boeing, Intel, and Cisco themselves. He is a CCNA, CCNP, a CCSP, and a certified Cisco instructor. Brandon is the author of Cisco Access Control Security.

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