Wireless Networks Essay Example | Topics and Well Written Essays - 1250 words

Wireless Networks - Essay Example(B) receiving set frequency is a term that refers to alternating current (AC) having characteristics such that, if the current is input to an antenna, an electromagnetic (EM) line of merchandise is generated suitable for wireless disperseing and/or communications. These frequencies cover a significant portion of the electromagnetic ray spectrum, extending from nine kilohertz (9 kHz),the lowest allocated wireless communications frequency (its within the range of human hearing), to thousands of gigahertz(GHz).When an RF current is supplied to an antenna, it gives rise to an electromagnetic sphere that propagates through space. This field is sometimes called an RF field in less technical jargon it is a radio wave. Any RF field has a wavelength that is in return proportional to the frequency. In the atmosphere or in outer space, if f is the frequency in megacycle and sis the wavelength in meters, thenThe frequency of an RF signal is inversely proport ional to the wavelength of the EM field to which it corresponds. At 9 kHz, the free-space wavelength is approximately 33 kilometers (km) or 21 miles (mi). At the highest radio frequencies, the EM wavelengths bankers bill approximately one millimeter (1 mm). As the frequency is increased beyond that of the RF spectrum, EM sinew takes the form of infrared (IR), visible, ultraviolet (UV), X rays, and gamma rays.Many types of wireless devices make use of RF fields. ... Many types of wireless devices make use of RF fields. Cordless and cellular telephone, radio and television broadcast stations, satellite communications systems, and two-way radio services all operate in the RF spectrum. some(prenominal) wireless devices operate at IR or visible-light frequencies, whose electromagnetic wavelengths are shorter than those of RF fields. Examples include intimately television-set remote-control boxes, some cordless computer keyboards and mice, and a few wireless hi-fi stereo headsets. (Se archNetworking.com)2. Wireless computer computer architectureWAP Architecture is divided into several layers. This is often called the WAP Stack. (Bharadwaj) The technical description of each layer of the wireless architecture is explained below.Wireless Application Environment (WAE)The goal of WAE is to establish an environment that allows users to build applications that can be utilize over a wide variety of wireless systems that can be implemented efficiently. In the WAP model, WAE would be the application environments that sends and receives requests from the Clients to the Gateway to the Origin Server. WAE is composed of user agents such as browsers, text editors, date make or phonebook. WAE is also composed of scripting, higher-lever programming languages and image formats. WAE uses languages such as WML Script (similar to JavaScript) and WML (similar to HTML).Wireless school term Protocol (WSP)The Wireless Session Protocol is the layer that deals with communication between client and proxy or server. The WSP provides dialog between client and server. Wireless Transaction Protocol (WTP)The Wireless Transaction Protocol, in a simple definition, deals with the transaction of data. WTP handles