Cover 1
Title Page 3
Copyright 4
Contents 11
Foreword 29
Introduction 31
Assessment Test 61
Chapter 1 Overview of Wireless Standards, Organizations, and Fundamentals 75
History of WLAN 76
Standards Organizations 78
Federal Communications Commission 79
International Telecommunication Union Radiocommunication Sector 80
Institute of Electrical and Electronics Engineers 81
Internet Engineering Task Force 82
Wi-Fi Alliance 84
International Organization for Standardization 89
Core, Distribution, and Access 90
Communications Fundamentals 91
Understanding Carrier Signals 92
Understanding Keying Methods 94
Summary 99
Exam Essentials 99
Review Questions 100
Chapter 2 Radio Frequency Fundamentals 105
What Is a Radio Frequency Signal? 107
Radio Frequency Characteristics 108
Wavelength 108
Frequency 113
Amplitude 114
Phase 115
Radio Frequency Behaviors 116
Wave Propagation 117
Absorption 118
Reflection 118
Scattering 120
Refraction 120
Diffraction 122
Loss (Attenuation) 123
Free Space Path Loss 125
Multipath 127
Gain (Amplification) 130
Summary 131
Exam Essentials 131
Review Questions 133
Chapter 3 Radio Frequency Components, Measurements, and Mathematics 137
RF Components 140
Transmitter 140
Antenna 141
Receiver 142
Intentional Radiator (IR) 142
Equivalent Isotropically Radiated Power 142
Units of Power and Comparison 144
Watt 145
Milliwatt (mW) 145
Decibel (dB) 146
dBi 148
dBd 148
dBm 149
Inverse Square Law 150
RF Mathematics 151
Rule of 10s and 3s 152
Noise Floor 163
Signal-to-Noise Ratio (SNR) 163
Received Signal Strength Indicator 163
Link Budget 168
Fade Margin/System Operating Margin 171
Summary 173
Exam Essentials 174
Review Questions 176
Chapter 4 Radio Frequency Signal and Antenna Concepts 181
Azimuth and Elevation Charts (Antenna Radiation Envelopes) 184
Interpreting Polar Charts 186
Beamwidth 188
Antenna Types 191
Omnidirectional Antennas 192
Semidirectional Antennas 195
Highly Directional Antennas 197
Sector Antennas 199
Antenna Arrays 200
Visual Line of Sight 203
RF Line of Sight 203
Fresnel Zone 203
Earth Bulge 208
Antenna Polarization 209
Antenna Diversity 210
Multiple-Input, Multiple-Output 211
MIMO Antennas 212
Antenna Connection and Installation 213
Voltage Standing Wave Ratio 213
Signal Loss 215
Antenna Mounting 215
Antenna Accessories 221
Cables 221
Connectors 222
Splitters 223
Amplifiers 223
Attenuators 224
Lightning Arrestors 224
Grounding Rods and Wires 226
Regulatory Compliance 228
Summary 229
Exam Essentials 229
Review Questions 231
Chapter 5 IEEE 802.11 Standards 235
Original IEEE 802.11 Standard 238
IEEE 802.11-2007 Ratified Amendments 240
802.11b-1999 240
802.11a-1999 241
802.11g-2003 243
802.11d-2001 246
802.11h-2003 246
802.11i-2004 248
802.11j-2004 249
802.11e-2005 249
IEEE Std 802.11-2012 250
802.11r-2008 253
802.11k-2008 253
802.11y-2008 255
802.11w-2009 255
802.11n-2009 256
802.11p-2010 256
802.11z-2010 257
802.11u-2011 257
802.11v-2011 257
802.11s-2011 258
Post-2012 Ratified Amendments 259
802.11ae-2012 259
802.11aa-2012 259
802.11ad-2012 259
802.11ac-2013 260
802.11af-2014 261
IEEE 802.11 Draft Amendments 262
802.11ah 262
802.11ai 263
802.11aj 263
802.11ak 263
802.11aq 263
Defunct Amendments 263
802.11F 263
802.11T 266
802.11m Task Group 267
Summary 267
Exam Essentials 268
Review Questions 269
Chapter 6 Wireless Networks and Spread Spectrum Technologies 273
Industrial, Scientific, and Medical Bands 275
900 MHz ISM Band 276
2.4 GHz ISM Band 276
5.8 GHz ISM Band 277
Unlicensed National Information Infrastructure Bands 277
U-NII-1 (Lower Band) 278
U-NII-2 (Middle Band) 278
U-NII-2 Extended 278
U-NII-3 (Upper Band) 279
Future U-NII Bands 280
3.6 GHz Band 282
4.9 GHz Band 282
Future Wi-Fi Frequencies 282
60 GHz 282
White-Fi 283
Narrowband and Spread Spectrum 284
Multipath Interference 285
Frequency Hopping Spread Spectrum 286
Hopping Sequence 287
Dwell Time 287
Hop Time 288
Modulation 288
Direct Sequence Spread Spectrum 289
DSSS Data Encoding 290
Modulation 291
Packet Binary Convolutional Code 291
Orthogonal Frequency Division Multiplexing 292
Convolutional Coding 293
Modulation 294
2.4 GHz Channels 295
5 GHz Channels 298
Adjacent, Nonadjacent, and Overlapping Channels 303
Throughput vs. Bandwidth 304
Communication Resilience 305
Summary 305
Exam Essentials 306
Review Questions 307
Chapter 7 Wireless LAN Topologies 311
Wireless Networking Topologies 312
Wireless Wide Area Network (WWAN) 312
Wireless Metropolitan Area Network (WMAN) 313
Wireless Personal Area Network (WPAN) 314
Wireless Local Area Network (WLAN) 314
802.11 Topologies 315
Access Point 316
Client Station 316
Integration Service 317
Distribution System 317
Wireless Distribution System 318
Service Set Identifier 321
Basic Service Set 322
Basic Service Set Identifier 322
Basic Service Area 323
Extended Service Set 324
Independent Basic Service Set 327
Mesh Basic Service Set 327
QoS Basic Service Set 329
802.11 Configuration Modes 329
Access Point Modes 330
Client Station Modes 331
Summary 331
Exam Essentials 332
Review Questions 333
Chapter 8 802.11 Medium Access 337
CSMA/CA vs. CSMA/CD 338
Collision Detection 339
Distributed Coordination Function 340
Interframe Space (IFS) 340
Duration/ID Field 341
Carrier Sense 342
Random Backoff Timer 344
Point Coordination Function 345
Hybrid Coordination Function 346
Enhanced Distributed Channel Access 346
HCF Controlled Channel Access 347
Block Acknowledgment 348
Wi-Fi Multimedia 349
Airtime Fairness 350
Summary 352
Exam Essentials 352
Review Questions 353
Chapter 9 802.11 MAC Architecture 357
Packets, Frames, and Bits 359
Data-Link Layer 360
MAC Service Data Unit 360
MAC Protocol Data Unit 360
Physical Layer 361
PLCP Service Data Unit 361
PLCP Protocol Data Unit 361
802.11 and 802.3 Interoperability 362
Three 802.11 Frame Types 364
Management Frames 365
Control Frames 365
Data Frames 366
Beacon Management Frame 367
Passive Scanning 368
Active Scanning 369
Authentication 371
Open System Authentication 371
Shared Key Authentication 372
Association 373
Authentication and Association States 374
Basic and Supported Rates 374
Roaming 375
Reassociation 375
Disassociation 377
Deauthentication 378
ACK Frame 378
Fragmentation 379
Protection Mechanism 381
RTS/CTS 383
CTS-to-Self 384
Data Frames 385
Power Management 386
Active Mode 387
Power Save Mode 387
Traffic Indication Map 387
Delivery Traffic Indication Message 388
Announcement Traffic Indication Message 389
WMM Power Save and U-APSD 389
802.11n Power Management 392
Summary 392
Exam Essentials 393
Review Questions 395
Chapter 10 WLAN Architecture 399
Wireless LAN Client Devices 400
802.11 Radio Form Factors 400
802.11 Radio Chipsets 407
Client Utilities 407
Management, Control, and Data Planes 411
Management Plane 412
Control Plane 412
Data Plane 413
WLAN Architecture 413
Autonomous WLAN Architecture 413
Centralized Network Management Systems 415
Cloud Networking 417
Centralized WLAN Architecture 417
Distributed WLAN Architecture 425
Unified WLAN Architecture 427
Hybrid Architecture 427
Specialty WLAN Infrastructure 428
Wireless Workgroup Bridge 428
Wireless LAN Bridges 428
Enterprise WLAN Routers 431
Wireless LAN Mesh Access Points 432
WLAN Array 433
Virtual AP System 434
Real-Time Location Systems 435
VoWiFi 436
Summary 438
Exam Essentials 438
Review Questions 440
Chapter 11 WLAN Deployment and Vertical Markets 445
Deployment Considerations for Commonly Supported WLAN Applications and Devices 447
Data 447
Voice 448
Video 448
Real-Time Location Services 449
Mobile Devices 450
Corporate Data Access and End-User Mobility 451
Network Extension to Remote Areas 452
Bridging: Building-to-Building Connectivity 452
Wireless ISP: Last-Mile Data Delivery 453
Small Office/Home Office 453
Mobile Office Networking 454
Branch Offices 455
Educational/Classroom Use 455
Industrial: Warehousing and Manufacturing 456
Retail 456
Healthcare: Hospitals and Offices 458
Municipal Networks 459
Hotspots: Public Network Access 459
Stadium Networks 461
Transportation Networks 461
Law Enforcement Networks 462
First-Responder Networks 463
Fixed Mobile Convergence 463
WLAN and Health 464
WLAN Vendors 465
Summary 467
Exam Essentials 467
Review Questions 468
Chapter 12 WLAN Troubleshooting and Design 473
Layer 2 Retransmissions 475
RF Interference 477
Multipath 481
Adjacent Channel Interference 482
Low SNR 483
Mismatched Power Settings 485
Near/Far 487
Hidden Node 488
802.11 Coverage Considerations 492
Dynamic Rate Switching 493
Roaming 496
Layer 3 Roaming 500
Co-channel Interference 502
Channel Reuse/Multiple-Channel Architecture 504
Channel Reuse/Channel Bonding 508
Single-Channel Architecture 511
Capacity vs. Coverage 514
Band Steering 516
Load Balancing 517
High-Density WLANs 518
Oversized Coverage Cells 521
Physical Environment 521
Voice vs. Data 521
Performance 523
Weather 524
Upper-Layer Troubleshooting 525
Summary 526
Exam Essentials 527
Review Questions 528
Chapter 13 802.11 Network Security Architecture 533
802.11 Security Basics 535
Data Privacy and Integrity 536
Authentication, Authorization, and Accounting 537
Segmentation 538
Monitoring and Policy 538
Legacy 802.11 Security 539
Legacy Authentication 539
Static WEP Encryption 540
MAC Filters 543
SSID Cloaking 543
Robust Security 544
Robust Security Network (RSN) 546
Authentication and Authorization 546
PSK Authentication 546
Proprietary PSK Authentication 548
802.1X/EAP Framework 549
EAP Types 551
Dynamic Encryption-Key Generation 552
4-Way Handshake 554
WPA/WPA2-Personal 555
TKIP Encryption 555
CCMP Encryption 556
Traffic Segmentation 558
VLANs 558
RBAC 560
Infrastructure Security 561
Physical Security 561
Interface Security 561
VPN Wireless Security 562
Layer 3 VPNs 562
SSL VPN 563
VPN Deployment 563
Guest WLAN Security 564
Captive Portal 565
Summary 567
Exam Essentials 567
Review Questions 569
Chapter 14 Wireless Attacks, Intrusion Monitoring, and Policy 573
Wireless Attacks 574
Rogue Wireless Devices 575
Peer-to-Peer Attacks 577
Eavesdropping 579
Encryption Cracking 582
Authentication Attacks 583
MAC Spoofing 585
Management Interface Exploits 586
Wireless Hijacking 586
Denial of Service (DoS) 588
Vendor-Specific Attacks 589
Social Engineering 590
Intrusion Monitoring 590
Wireless Intrusion Detection System 590
Wireless Intrusion Prevention System (WIPS) 593
Mobile WIDS 595
Spectrum Analyzer 596
Wireless Security Policy 597
General Security Policy 598
Functional Security Policy 598
Legislative Compliance 598
802.11 Wireless Policy Recommendations 600
Summary 601
Exam Essentials 601
Review Questions 602
Chapter 15 Radio Frequency Site Survey Fundamentals 607
WLAN Site Survey Interview 608
Customer Briefing 608
Business Requirements 609
Capacity and Coverage Requirements 610
Existing Wireless Network 613
Infrastructure Connectivity 615
Security Expectations 617
Guest Access 617
Documents and Reports 618
Forms and Customer Documentation 618
Deliverables 621
Additional Reports 621
Vertical Market Considerations 623
Outdoor Surveys 623
Aesthetics 624
Government 624
Education 625
Healthcare 626
Hotspots 626
Retail 627
Warehouses 627
Manufacturing 627
Multitenant Buildings 628
Summary 628
Exam Essentials 628
Review Questions 630
Chapter 16 Site Survey Systems and Devices 635
Site Survey Defined 636
Protocol and Spectrum Analysis 637
Spectrum Analysis 638
Coverage Analysis 642
AP Placement and Configuration 648
Application Analysis 648
Site Survey Tools 649
Indoor Site Survey Tools 650
Outdoor Site Survey Tools 653
Coverage Analysis 655
Manual 656
Predictive 658
Dynamic RF 659
Wireless Network Validation 660
Summary 661
Exam Essentials 662
Review Questions 663
Chapter 17 Power over Ethernet (PoE) 669
History of PoE 670
Nonstandard PoE 670
IEEE 802.3af 671
IEEE Std 802.3-2005, Clause 33 671
IEEE 802.3at-2009 671
IEEE Std 802.3-2012, Clause 33 671
An Overview of PoE Devices 672
Powered Device 672
Power-Sourcing Equipment 674
Endpoint PSE 675
Midspan PSE 676
Power-Sourcing Equipment Pin Assignments 679
Planning and Deploying PoE 683
Power Planning 683
Redundancy 686
802.11n or 802.11ac and PoE 687
Summary 688
Exam Essentials 689
Review Questions 690
Chapter 18 802.11n 695
802.11n-2009 Amendment 697
Wi-Fi Alliance Certification 698
MIMO 700
Radio Chains 701
Spatial Multiplexing (SM) 702
MIMO Diversity 704
Space-Time Block Coding (STBC) 705
Cyclic Shift Diversity (CSD) 705
Transmit Beamforming (TxBF) 706
HT Channels 708
20 MHz Non-HT and HT Channels 708
40 MHz Channels 710
Forty MHz Intolerant 712
Guard Interval (GI) 712
Modulation and Coding Scheme (MCS) 714
HT PHY 717
Non-HT Legacy 717
HT Mixed 718
HT Greenfield 719
HT MAC 719
A-MSDU 719
A-MPDU 720
Block Acknowledgment 721
Reduced Interframe Space 722
HT Power Management 722
HT Operation 723
20/40 Channel Operation 724
HT Protection Modes (0–3) 724
RTS/CTS and CTS-to-Self 725
Summary 726
Exam Essentials 726
Review Questions 728
Chapter 19 Very High Throughput (VHT) and 802.11ac 733
802.11ac-2013 Amendment 736
5 GHz Only 737
20, 40, 80, and 160 MHz Channels 737
256-QAM Modulation 743
Modulation and Coding Schemes 746
Single-User MIMO 747
802.11ac Data Rates 748
VHT MAC 750
A-MPDU 751
RTS/CTS 751
Beamforming 754
Explicit Beamforming 754
Multiuser MIMO 755
Multiuser Beamforming 756
Quality of Service 758
Infrastructure Requirements 759
Ethernet 759
Power 761
802.11ac in a SOHO or Home 762
Device Radios 762
Data Flow/Usage 762
Spatial Streams 763
Wider 802.11ac Channels 763
MU-MIMO 763
Wi-Fi Alliance Certification 763
Summary 764
Exam Essentials 765
Review Questions 766
Chapter 20 Bring Your Own Device (BYOD) 771
Mobile Device Management 773
Company-Issued Devices vs. Personal Devices 775
MDM Architecture 775
MDM Enrollment 777
MDM Profiles 780
MDM Agent Software 783
Over-the-Air Management 784
Application Management 786
Wi-Fi Client Onboarding 787
Guest WLAN Access 788
Guest SSID 788
Guest VLAN 789
Guest Firewall Policy 789
Captive Web Portals 791
Client Isolation, Rate Limiting, and Web Content Filtering 793
Guest Management 793
Guest Self-Registration 795
Employee Sponsorship 795
Social Login 797
Encrypted Guest Access 798
Network Access Control (NAC) 799
Posture 799
NAC and BYOD 800
OS Fingerprinting 800
AAA 801
RADIUS Change of Authorization 801
Summary 802
Exam Essentials 802
Review Questions 804
Appendix A Answers to Review Questions 809
Chapter 1: Overview of Wireless Standards, Organizations, and Fundamentals 810
Chapter 2: Radio Frequency Fundamentals 812
Chapter 3: Radio Frequency Components, Measurements, and Mathematics 814
Chapter 4: Radio Frequency Signal and Antenna Concepts 816
Chapter 5: IEEE 802.11 Standards 818
Chapter 6: Wireless Networks and Spread Spectrum Technologies 820
Chapter 7: Wireless LAN Topologies 822
Chapter 8: 802.11 Medium Access 824
Chapter 9: 802.11 MAC Architecture 826
Chapter 10: WLAN Architecture 828
Chapter 11: WLAN Deployment and Vertical Markets 831
Chapter 12: WLAN Troubleshooting and Design 833
Chapter 13: 802.11 Network Security Architecture 836
Chapter 14: Wireless Attacks, Intrusion Monitoring, and Policy 838
Chapter 15: Radio Frequency Site Survey Fundamentals 841
Chapter 16: Site Survey Systems and Devices 844
Chapter 17: Power over Ethernet (PoE) 846
Chapter 18: 802.11n 848
Chapter 19: Very High Throughput (HT) and 802.11ac 851
Chapter 20: Bring Your Own Device (BYOD) 853
Appendix B Abbreviations and Acronyms 857
Certifications 858
Organizations and Regulations 858
Measurements 859
Technical Terms 860
Appendix C About the Additional Study Tools 871
Additional Study Tools 872
Sybex Test Engine 872
Electronic Flashcards 872
PDF of Glossary of Terms 872
Adobe Reader 872
System Requirements 873
Using the Study Tools 873
Troubleshooting 873
Customer Care 874
Index 875
Free Online Study Tools 914
EULA 915
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