9781587202117

While he focuses specifically on the objectives for the CCNA Wireless IUWNE exam, senior wireless instructor Carroll shares preparation hints and test-taking tips, helping readers identify areas of weakness and improve both their conceptual knowledge and hands-on skills.

Brandon James Carroll, CCNA, CCNP, CCSP, is one of the leading instructors for Cisco security technologies in the country, teaching classes that include the CCNA, CCNP, and CCSP courses, numerous CCVP courses, and custom developed courseware.

In his eight years with Ascolta, Brandon has developed and taught many private Cisco courses for companies such as Boeing, Intel, and Cisco. He is a certified Cisco instructor and the author of Cisco Access Control Security, in addition to several Quick Reference Sheets. Prior to becoming a technical instructor for Ascolta, Brandon was a technician and an ADSL specialist for GTE Network Services and Verizon Communications. His duties involved ISP router support and network design. As a lead engineer, he tested and maintained Frame Relay connections between Lucent B-STDX and Cisco routers. His team was in charge of troubleshooting ISP Frame Relay to ATM cut-overs for ADSL customers. Brandon trained new employees at Verizon to the EPG in ADSL testing and troubleshooting procedures and managed a Tekwizard database for technical information and troubleshooting

techniques. He majored in information technology at St. Leo University.

Foreword	p. xix
Introduction	p. xx
Wireless LAN Fundamentals	p. 2
Introduction to Wireless Networking Concepts	p. 5
Do I Know This Already? Quiz	p. 5
Foundation Topics	p. 8
Wireless Local-Area Networks	p. 8
How Bandwidth Is Achieved from RF Signals	p. 8
Unlicensed Frequency Bands Used in WLANs 9900 MHz 112.4 GHz 115 GHz	p. 12
Modulation Techniques and How They Work	p. 12
DSSS	p. 12
MIMO	p. 16
Dynamic Rate Shifting	p. 17
Sending Data Using CSMA/CA	p. 17
Exam Preparation Tasks	p. 18
Review All Key Concepts	p. 18
Complete the Tables and Lists from Memory	p. 18
Definition of Key Terms	p. 18
Standards Bodies	p. 21
Do I Know This Already? Quiz	p. 21
Foundation Topics	p. 24
Wireless Standards and Regulatory Committees	p. 24
FCC	p. 24
ETSI	p. 25
IEEE	p. 27
Wi-Fi Certification	p. 27
Exam Preparation Tasks	p. 28
Review All the Key Topics	p. 28
Complete the Tables and Lists from Memory	p. 28
Definition of Key Terms	p. 28
WLAN RF Principles	p. 31
Do I Know This Already? Quiz	p. 31
Foundation Topics	p. 34
Characteristics of Wireless Networks	p. 34
Review of Wavelength	p. 34
Review of Frequency	p. 34
Review of Amplitude	p. 35
What Is Effective Isotropic Radiated Power?	p. 35
Influences on Wireless Transmissions	p. 35
Understanding the Free Path Loss Model	p. 35
Understanding Absorption	p. 36
Understanding Reflection	p. 38
Understanding Multipath	p. 39
Understanding Scattering	p. 39
Understanding Refraction	p. 40
Understanding Line of Sight	p. 41
Determining Signal Strength Influences	p. 42
The Fresnel Zone	p. 42
Received Signal Strength Indicator	p. 42
Signal-to-Noise Ratio	p. 43
Link Budget	p. 44
Exam Preparation Tasks	p. 45
Review All Key Concepts	p. 45
Definition of Key Terms	p. 45
WLAN Technologies and Topologies	p. 47
Do I Know This Already? Quiz	p. 47
Foundation Topics	p. 52
General Wireless Topologies	p. 52
WPAN	p. 52
WLAN	p. 53
WMAN	p. 54
WWAN	p. 54
Original 802.11 Topologies	p. 55
Overview of Ad Hoc Networks	p. 55
Network Infrastructure Mode	p. 55
Service Set Identifiers	p. 58
Vendor-Specific Topology Extensions	p. 59
Workgroup Bridges	p. 59
Repeaters	p. 60
Outdoor Wireless Bridges	p. 61
Outdoor Mesh Networks	p. 62
Exam Preparation Tasks	p. 64
Review All the Key Topics	p. 64
Definition of Key Terms	p. 64
Antenna Communications	p. 67
Do I Know This Already? Quiz	p. 67
Foundation Topics	p. 71
Principles of Antennas	p. 71
Polarization	p. 71
Diversity	p. 71
Common Antenna Types	p. 73
Omnidirectional Antennas	p. 73
Directional Antennas	p. 79
Antenna Connectors and Hardware	p. 89
Attenuators	p. 89
Amplifiers	p. 89
Table of Contents provided by Publisher. All Rights Reserved.

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CCNA Wireless Official Exam Certification Guide CCNA Wireless Official Exam Certification Guide IntroductionWelcome to the world of Cisco Certified Network Associate (CCNA) Wireless! As technology continues to evolve, wireless technologies are finding their way to the forefront. This clearly indicates the progression from a fixed wired type of connectivity to a more fluid, mobile workforce that can work when, where, and how they want. Regardless of your background, one of the primary goals of the new CCNA Wireless certification is to introduce you to the Cisco Unified Wireless Network (CUWN).In June 2008, Cisco announced new CCNA specialties, including CCNA Security, CCNA Wireless, and CCNA Voice. These certifications, released 10 years after the initial CCNA, represent the growth of Cisco into new and emerging industries. Certification candidates can now specialize into specific areas of study. Figure I-1 shows the basic organization of the certifications and exams used to achieve your CCNA Wireless certification.Figure I-1 Cisco Certifications and CCNA Wireless Certification PathAs you can see from the figure, a traditional CCNA certification is a prerequisite before you venture into the CCNA Wireless certification. Goals and MethodsThe most important and somewhat obvious goal of this book is to help you pass the Implementing Cisco Unified Wireless Networking Essentials (IUWNE) exam (640-721). In fact, if the primary objective of this book were different, the book title would be misleading; however, the methods used in this book to help you pass the IUWNE exam are designed to also make you much more knowledgeable about how to do your job.This book uses several key methodologies to help you discover the exam topics that you need to review in more depth so that you can fully understand and remember those details and prove to yourself that you have retained your knowledge of those topics. This book does not try to help you pass by memorization but helps you truly learn and understand the topics. The CCNA Wireless exam is the foundation for Cisco professional certifications to come, and it would be a disservice to you if this book did not help you truly learn the material. Therefore, this book will help you pass the CCNA Wireless exam by using the following methods:Helping you discover which test topics you have not masteredProviding explanations and information to fill in your knowledge gapsSupplying exercises and scenarios that enhance your ability to recall and deduce the answers to test questionsProviding practice exercises on the topics and the testing process via test questions on the CDIn addition, this book uses quite a different style from typical certification-preparation books. The newer Cisco certification exams have adopted a style of testing that essentially says, "If you do not know how to do it, you will not pass this exam." This means that most of the questions on the certification exam require you to deduce the answer through reasoning or configuration rather than just memorization of facts, figures, or syntax from a book. To accommodate this newer testing style, I have written this book as a "real-world" explanation of Cisco wireless topics. Whenever possible, key concepts are explained using real-world examples rather than showing tables full of syntax options and explanations, which are freely available at Cisco.com. As you read through this book, you will definitely get a feeling of, "This is how I candothis" rather than, "There is the general syntax I need to memorize," which is exactly what you need for the newer Cisco exams. Who Should Read This Book?This book is designed to provide a twofold purpose. The primary purpose is to tremendously increase your chances of

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CCNA Wireless Official Exam Certification Guide (CCNA IUWNE 640-721)

CCNA Wireless Official Exam Certification Guide (CCNA IUWNE 640-721)

1587202115

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