cwts certified wireless technology specialist official study guide exam pw0 070 phần 1 ppt

He has attained many technical certifications over the years, including Master Certified Novell Engineer MCNE, Certified Novell Instructor CNI, Microsoft Certified Systems Engineer MCSE,

CWTS Certified Wireless Technology Specialist Official Study Guide

Robert J Bartz

Development Editor: Stef Jones

Technical Editors: Bryan Harkins and Marcus Burton

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Copyright © 2009 by Wiley Publishing, Inc., Indianapolis, Indiana

Published simultaneously in Canada

ISBN: 978-0-470-43889-3

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Library of Congress Cataloging-in-Publication Data

1 Wireless LANs—Examinations—Study guides 2 Telecommunications engineers—Certification—Study

guides I Title II Title: Certified wireless technology specialist official study guide (PW0-070)

TK5105.78.B37 2009

621.384076—dc22

2009010840

TRADEMARKS: Wiley, the Wiley logo, and the Sybex logo are trademarks or registered trademarks of John

Wiley & Sons, Inc and/or its affiliates, in the United States and other countries, and may not be used without

written permission CWTS is a trademark of CWNP, Inc All other trademarks are the property of their

respec-tive owners Wiley Publishing, Inc., is not associated with any product or vendor mentioned in this book.

Guide This book is part of a family of premium-quality Sybex books, all of which are

written by outstanding authors who combine practical experience with a gift for teaching

Sybex was founded in 1976 More than thirty years later, we’re still committed to

produc-ing consistently exceptional books With each of our titles we’re workproduc-ing hard to set a

new standard for the industry From the paper we print on to the authors we work with,

our goal is to bring you the best books available

I hope you see all that reflected in these pages I’d be very interested to hear your

com-ments and get your feedback on how we’re doing Feel free to let me know what you think

about this or any other Sybex book by sending me an email at nedde@wiley.com, or if you

think you’ve found a technical error in this book, please visit http://sybex.custhelp.com

Customer feedback is critical to our efforts at Sybex

Best regards,

Neil Edde Vice President and Publisher Sybex, an Imprint of Wiley

great inspiration to me I want to say thanks, Mom.

I would like to thank my wife, Jeannie, and two young adult children, Ashley and Jason, and to say how much I appreciate the support I received during the writing process of this book This book was a huge task that took hundreds of hours and kept me locked away for days at a time They made completing this project much easier for me because of their sup-port, patience, and understanding.

I would also like to thank all the people at Sybex who helped with the creation of this book, including Acquisitions Editor Jeff Kellum, Production Editor Rachel McConlogue, Copy Editor Lunaea Hougland, Editorial Assistant Connor O’Brien and Editorial Manager Pete Gaughan I owe all these individuals a ton of gratitude for their patience while work-ing with me on this project, including having to deal with a few unexpected delays

A very special thanks goes to the Development Editor Stef Jones for all her hard work in helping me with the editing, organization, and suggestions that allowed me to complete this book and still maintain my sanity Her knowledge, expertise, and attention to detail were

an enormous help to me

The Technical Editor of this book is Bryan Harkins I want to thank Bryan for his timely reviews, comments, and suggestions that helped make this book a valuable reference source for sales and technical support people His years of experience as a technical trainer, engi-neer, and security specialist were a great contribution in creating a book I hope you will enjoy reading

I would like to thank the thousands of students who have taken the time to attend the working classes I was given the opportunity to teach Educating, mentoring, and entertaining

net-so many of these individuals gave me the inspiration and motivation to author this book

Of course, this book would not exist if it were not for the people at CWNP This group

of individuals I have known for many years includes Kevin Sandlin, Scott Williams, Devin Akin, and Scott Turner as well as some of the newer members of the team, Cary Chandler, Marcus Burton, Trish Bruce, Abbey Cole, and all the others They have realized the need for vendor-neutral wireless LAN training and certification and have done a great job of building a brand over the years that is now known worldwide

Finally, a thank you to all the manufacturers, vendors, organizations, and individuals that provided the subject matter, allowing me the technology and tools needed to write this book

Aerohive – www.aerohive.com

Stephen Philip and Adam Conway

AirMagnet – www.airmagnet.com

Joe Kuo and Dilip Advani

Aruba Networks – www.arubanetworks.com

Brad Day and Michael Tennefoss

Broadcom Corporation – www.broadcom.com

Cisco Systems – www.cisco.com

HP ProCurve (Colubris Networks) – www.procurve.com

PCMCIA Association – www.pcmcia.org

Mary Hain, Hain Communications

Proxim Wireless – www.orinocowireless.com

Psiber Data Systems – www.psiber.com

Trapeze Networks – www.trapezenetworks.com

USB Implementers Forum, Inc – www.usb.org

Wi-Fi Alliance – www.wi-fi.org

WildPackets – www.wildpackets.com

Xirrus – www.xirrus.com

Douglas Haider

Robert Bartz is a technical trainer and computer networking consultant He is a graduate

of California State University Long Beach, School of Engineering, with a Bachelor of Science degree in Industrial Technology Prior to becoming a computer networking engineer and trainer, Robert was employed as an aerospace test engineer working with radar systems and satellite communications He has attained many technical certifications over the years, including Master Certified Novell Engineer (MCNE), Certified Novell Instructor (CNI), Microsoft Certified Systems Engineer (MCSE), Microsoft Certified Trainer (MCT), CWNP Certified Wireless Network Administrator (CWNA), Certified Wireless Security Profes-sional (CWSP), and Certified Wireless Network Trainer (CWNT), to name a few He has been involved with the CWNP program since its inception and has taught this technology

to thousands of people from various industries and markets across the United States and abroad

Robert is the founder of Eight-O-Two Technology Solutions, LLC, a computer ing technical training and consulting services company providing education and services to various organizations both local and around the country He spends his spare time learning new technology, working outside, and enjoying the beauty of his surroundings at his home

network-in Monument, Colorado Robert hopes one day to semi-retire and be the proprietor of a neighborhood eating and drinking establishment in a warm sunny beach community He can be contacted by e-mail at robert@eightotwo.com

Foreword xxi

Chapter 1 Introduction to Wireless Local Area Networking 1

Chapter 2 Wireless LAN Infrastructure Devices 27

Chapter 4 Radio Frequency (RF) Fundamentals for

Chapter 5 Access Methods, Architectures, and

Chapter 11 Troubleshooting and Maintaining Wireless Networks 381

Foreword xxi

Chapter 1 Introduction to Wireless Local Area Networking 1

Enterprise Deployments: Corporate Data Access

Extending Existing Networks with Wireless LAN 5Mobile Office and Public Wireless Hotspots 5Educational Institutions: Classroom Deployments 6

Industrial, Municipal, Law Enforcement, and

Radio Frequency Regulatory Domain Governing Bodies 9United States: Federal Communications Commission (FCC) 10Europe: European Telecommunications Standards

Wi-Fi Protected Setup (WPS) Certification Overview 19

Key Terms 20

Chapter 2 Wireless LAN Infrastructure Devices 27

Installation and Configuration of PCMCIA Cards 64

Installation and Configuration of an ExpressCard 69

Installation and Configuration of SDIO Cards 75

Installation and Configuration of PCI Cards 77

Mini-PCI and Mini-PCIe (Mini-PCI Express) 79Features of Mini-PCI and Mini-PCIe Cards 79Installation and Configuration of Mini-PCI and

Installation and Configuration of Workgroup/Client Bridges 83

Manufacturer-Specific Client Utilities 85

Chapter 4 Radio Frequency (RF) Fundamentals for

Chapter 5 Access Methods, Architectures, and

Detecting Network Traffic Collisions with CSMA/CD 133Avoiding Network Traffic Collisions with CSMA/CA 134Reserving Time for Data Transmission Using

Distributed Coordination Function (DCF) 135Effects of Half Duplex on Wireless Throughput 135Narrowband vs Spread Spectrum Communication 136

Frequency-Hopping Spread Spectrum (FHSS) 138Direct-Sequence Spread Spectrum (DSSS) 140High Rate/Direct-Sequence Spread Spectrum (HR/DSSS) 140

Highly Directional Antenna Specifications 182

RF Cables and Connectors 184

Addressing the Effects of Earth Curvature 187

Manufacturer Guidelines and Deployment Guides 265Defining Physical and Data Security Requirements 265

Documenting Existing Network Characteristics 267Identifying Infrastructure Connectivity and Power Requirements 268

Understanding RF Coverage and Capacity Requirements 270

Wi-Fi and Non-Wi-Fi Interference Sources 289

Identifying Existing Wireless Networks 300

Advantages and Disadvantages of Manual Site Survey 303

Chapter 10 WLAN Security 337

PIN-Based or Push-Button Configuration (PBC)

Chapter 11 Troubleshooting and Maintaining

Infrastructure Hardware Selection and Placement 405Identifying, Locating, and Removing Sources

Analyzing Infrastructure Capacity and Utilization 407

Demonstration Software Programs

Exercise 3.1 PCMCIA Card Installation Steps 65

Exercise 3.2 Installing a USB 2 0 Wireless LAN Adapter 71

Exercise 3.3 PCI Card Installation Steps 77

Exercise 3.4 Mini-PCI and Mini-PCIe Installation Steps 81

Exercise 4.1 How to Demonstrate Fresnel Zone and Blockage 111

Exercise 6.1 Demonstrate Passive Gain 165

Exercise 6.2 Steps for Installing a Pole/Mast Mount 193

Exercise 7.1 How to Measure Throughput of a Wireless Network 229

Exercise 9.1 Spectrum Analysis Demonstration 290

Exercise 9.2 PC Card Spectrum Analyzer Demonstration 294

Exercise 9.3 Predictive Site Survey Demonstration 309

Exercise 9.4 Protocol Analyzer Demonstration 314

Exercise 10.1 VPN Setup 364

Exercise 11.1 Upgrading a Device Driver 399

Manufacturers, value added resellers (VARs), and end-user organizations are now seeing the value of training and certifying not only “techies,” but account managers, sales repre-sentatives, project managers, help desk professionals, and others with similar roles on Wi-Fi technology For maximum ROI, it’s important that this Wi-Fi training and certification be appropriate to these specific job roles The Wi-Fi landscape is continually changing, and keeping abreast of trends, terminology, and technology has never been more important

With all of this change, how can an organization be sure to train and certify its people on relevant and position-appropriate material? How can an organization provide an upwardly mobile learning path should its people change positions? How can an organization be sure that the training being provided to its people will continue to be relevant should they decide

to partner with a different or additional vendor? These are valid concerns faced by large organizations every day, and CWNP has the answer CWNP’s new Certified Wireless Technology Specialist (CWTS™) certification has been targeted at these user groups with the modus operandi “what it is, not how it works.” For example, in most organizations it’s

clear that a Wi-Fi account manager needs to understand what an RF site survey is and why it’s important in given circumstances, but it’s also clear why the account manager doesn’t need to understand every nuance of performing an RF site survey in order to accomplish his

or her own sales functions The same applies to a plethora of topics, from understanding Wi-Fi equipment types to Wi-Fi security

Wi-Fi terminology is a world of confusion in and of itself, but the confusion can be greatly reduced with even a minimal amount of targeted education It doesn’t help that marketing departments at various manufacturers create a new marketing term for every new technol-ogy offering, often changing their own terminology for the purpose of differentiation Most technologies, devices, equipment features, architectures, and the like have industry-standard names Such standardized naming conventions are facilitated by the IEEE, Wi-Fi Alliance, and by CWNP For example, when implementing a single channel architecture (a term that also has various marketing terms in the industry) system, each channel is called a This could be a span, stack, layer, blanket, channel, or perhaps something new in the near

future They all mean the same thing How is the customer to compare apples-to-apples when Wi-Fi terminology is all over the map? This is where trained people make all the difference

The book you now hold in your hand is an important step in studying for the CWTS

certification The CWTS: Certified Wireless Technology Specialist Official Study Guide

covers the CWTS exam objectives step-by-step in a concise manner It’s a no-nonsense approach to obtaining a certification that will differentiate you from your peers and help you wins sales, better support your customers, and most of all, grow in your career

Robert Bartz has been part of the CWNP program since day 1, when in our very first class in November 2001 he sat front-left paying close attention while I was explaining RF behavior Thereafter, he very quickly passed the CWNA exam and moved on to become one of our first instructors He has participated in CWNP in a variety of ways over the

years and has added significant value to the program as a whole He has taught CWNP

classes at every level and to diverse audiences around the globe since 2001, and it’s easy to

give both Robert and his new book a big thumbs-up I would also like to thank Sybex for

producing such high-quality books for CWNP They are a class act through and through,

and we look forward to working with them more in the future Now, what are you waiting

for? Stop reading this foreword, and get on to Chapter 1 Your future in Wi-Fi awaits!

Devin Akin

Chief Technology Officer The CWNP Program

This book is intended to provide an introduction to the exciting and emerging world of wireless LAN technology This technology continues to expand at a phenomenal pace with constant improvements in speed, reliability, and security Reading this book will teach you the fundamentals of standards-based technology, giving you an overview of the design, communication, hardware components, and maintenance associated with wireless LAN technology, commonly referred to as Wi-Fi™

In addition to providing an overview of the technology, this book will help you prepare for the Certified Wireless Technology Specialist (CWTS) certification exam available from the CWNP program CWTS is an entry-level enterprise wireless LAN certification, and is recommended prior to the Certified Wireless Network Administrator (CWNA) certifica-tion CWTS is designed as a replacement for the Wireless# Certification This certification

is geared specifically toward both wireless LAN (WLAN) sales and support staff for those

in the enterprise WLAN industry

Not only will this book help you prepare for the CWTS Certification exam, it will give you the fundamental knowledge, tools, and terminology to more effectively sell and support enterprise WLAN technologies The main goal of this book is for you to learn “what it is,”

not “how it works.” The “how” part comes later in other CWNP Study Guides and led courses After reading this book and completing all the available practice exam tools included, you will have the knowledge needed to take the CWTS certification exam

instructor-Finally, the CD included with this book contains evaluation software you can install in order to become familiar with RF spectrum analysis, perform some limited packet analysis, and explore site survey tools

For more information about the CWTS and other vendor-neutral wireless LAN tions from the CWNP program, visit www.cwnp.com

certifica-About CWNP®

CWNP is the abbreviation for Certified Wireless Network Professional and is the industry standard for vendor-neutral, enterprise wireless LAN certifications CWNP currently offers five levels of enterprise WLAN certifications, from novice to expert The goal of CWNP is

to provide educational resources and certifications that are recognized worldwide to mation technology (IT) and sales professionals in the field of wireless networking technol-ogy By acquiring this knowledge, these professionals will be able to enter any business and sell, design, install, manage, and support the wireless LAN infrastructure regardless of which manufacturer’s solution is used

infor-In addition to CWTS, there are four other wireless certifications currently offered from CWNP:

CWNA ® : Certified Wireless Network Administrator The CWNA® (Certified Wireless Network Administrator) certification is the foundation-level enterprise wireless LAN cer-tification for the CWNP program The CWNA certification will validate one’s skills to

successfully administer enterprise-class wireless LANs Passing the CWNA exam will earn

one credit toward the more advanced CWNP certifications The CWNA exam measures

one’s ability to understand the fundamentals of RF behavior and to describe the features

and functions of various WLAN components Passing the PW0-104, Wireless LAN

Admin-istration certification exam will satisfy the requirement to become CWNA certified

CWSP ® : Certified Wireless Security Professional The CWSP® (Certified Wireless Security

Professional) certification is an advanced-level WLAN certification offered by the CWNP

program Acquiring this certification will prove one’s ability to successfully apply the most

up-to-date wireless LAN security solutions to an organization’s wireless LAN This

certifi-cation will ensure that the successful candidate understands the security weaknesses

inher-ent in wireless LANs, the solutions available to address those weaknesses, and the steps

necessary to implement a secure and manageable wireless LAN in an enterprise

environ-ment Successfully passing two exams is required to become CWSP certified:

Exam PW0-104 – Wireless LAN AdministrationN

NExam PW0-200 – Wireless LAN SecurityN

N

CWNE ® : Certified Wireless Network Expert The CWNE® credential is the final

certifica-tion step in the CWNP program By successfully completing the CWNE requirements, one

will have demonstrated that they have the most advanced skills available in today’s

wire-less LAN market CWNE assures that the skills mastered include the ability to administer,

install, configure, troubleshoot, and design wireless network systems Additional skills

include protocol analysis, intrusion detection and prevention, performance and QoS

analy-sis, spectrum analyanaly-sis, and WLAN management

In order to become CWNE certified, one must pass the PW0-104, PW0-200, and PW0-300

exams, and hold a valid CWSP certification at the time of application for CWNE

Success-fully passing these exams is not all that is required To maintain CWNE certification, the

following criteria must be met:

Pass all three exams, PW0-104, PW0-200, and PW0-300N

NProfessional experience N

NThree letters of endorsement N

N

60 points in the CWNE points schedule N

NContinuing education requirementN

N

For additional information on the details required for CWNE certification, visit www.cwnp.com

CWNT ® : Certified Wireless Network Trainer Certified Wireless Network Trainers

(CWNT®) are qualified instructors certified by the CWNP program to deliver CWNP

training courses to IT professionals CWNTs are technical and instructional experts in