By Gilbert Held
Revenues of IEEE 802.11x compliant instant LANs are actually exploding. regrettably the manuals that accompany the gear don't deal with issues reminiscent of web site choice, apparatus interoperability with items from assorted owners, the right way to collect and configure various firewalls, community tackle translation, and router software program that turns into valuable while connecting to the web. development a instant place of work covers those themes and more.Written for a large viewers of readers who're both contemplating using instant LANs or have to how one can use them extra successfully, the textual content teaches how instant LANs function, the adaptation among at present to be had and rising items, and why new instant LANs that function at better info premiums is probably not compatible nor within your budget for all organisations. targeting key themes linked to the development of a instant place of work this how-to consultant explains technical matters in non-technical phrases. The textual content discusses a number of components asociated with instant protection that might reduce the potential of your communique being learn by way of unathorized events. construction a instant workplace offers you info you should use to successfully and economically build a instant workplace ranging in scope from pcs sharing info over the air, to the interconnection of 1000's to millions of instant items.
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Additional info for Building A Wireless Office
As we discuss wireless LAN standards later in this book, we examine the channels used by different methods of RF communications. Direct Sequence Spread Spectrum A second spread-spectrum RF communications method that wireless LANs use is referred to as direct sequence spread spectrum (DSSS). Under DSSS, each data bit to be transmitted is mapped into a common pattern of bits based on a spreading code. The spreading code consists of a fixed number of bits that are known to the transmitter and receiver, with each bit in the code called a chip.
5 MHz of available bandwidth. 4-GHz frequency band. 0-GHz band, has 300 MHz of spectrum allocated for unlicensed operations. 35 GHz. 825 GHz. The lower 200 MHz consists of two 100-MHz bands. 25 GHz is restricted to a maximum power output of 50 mW. 35 GHz, has a more generous 250-mW power budget, while the top 100 MHz, which is restricted to outdoor operations, has a maximum 1-W power output. Where Wireless LANs Reside To obtain an appreciation for where the three ISM frequency bands reside with respect to other applications, let’s examine a few frequencies associated with different applications.
As previously mentioned, you can use this information as is or in conjunction with the Index or Table of Contents to locate information of immediate interest. Book Preview This book consists of eight chapters, and although each chapter was written to be as independent as possible from the other chapters, it is recommended that you read the material in the order in which it is presented. This is especially true for readers with a limited background in networking or network technology. Technology and Terminology The second chapter in this book, which is entitled “Technology and Terminology,” covers both topics with respect to wireless LANs.