networking - Wireless Networking in the Developing World...

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Unformatted text preview: Wireless Networking in the Developing World Second Edition A practical guide to planning and building low-cost telecommunications infrastructure Wireless Networking in the Developing World For more information about this project, visit us online at http://wndw.net/ First edition, January 2006 Second edition, December 2007 Many designations used by manufacturers and vendors to distinguish their products are claimed as trademarks. Where those designations appear in this book, and the authors were aware of a trademark claim, the designations have been printed in all caps or initial caps. All other trademarks are property of their respective owners. The authors and publisher have taken due care in preparation of this book, but make no expressed or implied warranty of any kind and assume no responsibility for errors or omissions. No liability is assumed for incidental or consequential damages in connection with or arising out of the use of the information contained herein. 2007 Hacker Friendly LLC, http://hackerfriendly.com/ This work is released under the Creative Commons Attribution-ShareAlike 3.0 license. For more details regarding your rights to use and redistribute this work, see http://creativecommons.org/licenses/by-sa/3.0/ Contents Where to Begin 1 ........................................................................................................................... Purpose of this book 2 .......................................................................................... Fitting wireless into your existing network 3 ............................................................................................................. Wireless networking protocols 3 ............................................................................................................................. Question & Answer 5 A Practical Introduction to Radio Physics 9 ................................................................................................................................. What is a wave? 9 ...................................................................................................................................... Polarization 13 ........................................................................................................... The electromagnetic spectrum 13 ........................................................................................................................................ Bandwidth 15 ................................................................................................................. Frequencies and channels 15 ................................................................................................................... Behavior of radio waves 15 ...................................................................................................................................... Line of sight 22 ............................................................................................................................................... ....
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networking - Wireless Networking in the Developing World...

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