By Wale Soyinka
Research the necessities of instant networking Configure, deal with, and safe instant networks utilizing the step by step information during this functional source. instant community management: A Beginner's advisor indicates you ways to paintings with the most recent instant networking criteria, together with the 802.11x family members, on home windows, Mac, and Linux systems. The ebook covers instant community making plans, layout, undefined, companies, protocols, machine configuration, safety, troubleshooting, and extra. This hands-on advisor gets you began administering instant networks very quickly. Get info on regulatory and technical firms know about varied instant criteria and the fundamentals of RF applied sciences comprehend and ascertain client-side necessities, together with chipsets and diverse instant interfaces decide upon infrastructure-side instant undefined, corresponding to antennas, instant entry issues (WAPs), residential gateways, switches/controllers, routers, and bridges find out about WLANs, WWANs, WMANs, and WPANs paintings with common instant community protocols--TCP/IP (IPv4 and IPv6) comprehend DNS, DHCP, and different aiding infrastructure prone safe instant networks utilizing cryptography Configure infrastructure units, together with a instant entry element equipment and instant community switches and controllers Configure and deal with instant Microsoft home windows, Mac OS X, and Linux consumers Plan, layout, survey, install, and troubleshoot your instant community
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Additional info for Wireless Network Administration A Beginner's Guide (Network Pro Library)
Sample text
This is a good recipe for an industry that can quickly become unmanageable in the absence of organizations that can be entrusted with certain oversight functions. Several regulatory bodies help to regulate the use and allocation of the wireless radio spectrum around the world (among other things). Some of the organizations operate at an international level, some at a regional level, and some at a national level. Several organizations are influential in developing the standards that drive a lot of wireless technologies, and these standards will be discussed throughout this book.
Conveniently for us, the attributes—amplitude, frequency, wavelength, and phase— that we care about in radio waves can also be extrapolated unto sine waves. This is why sine waves are so important in radio communications. Figure 2-1 shows a simple sine wave. These characteristics are discussed in detail in the next section. Frequency Frequency is a central and measurable characteristic of a wave. Generically speaking, it’s a measure of the number of occurrences of a repeating event per fixed unit of time.
One of these reasons is that the transmitter power usage of AM is very inefficient. A popular implementation of AM is found in AM radio broadcasts. Frequency Modulation (FM) This analog modulation technique works by varying the frequency of the transmitted signal relative to the information signal. A key difference between FM and its distant cousin, FSK, is that FM does not aim to map the changes in frequency to discrete digital values of 0’s and 1’s. So we wouldn’t normally use FM as a modulation technique for WLAN communications, which deal with digital and analog signals.