| The information age has been revolutionized not | | | | network to get rid of the hassles of laying cables. |
| just by the power of computers to process data, | | | | The mobile wireless systems support mobility of |
| but also by the power of communication amongst | | | | the equipment, enabling the user to access |
| computers. This communication is responsible for | | | | information from anywhere and at any time. The |
| the proliferation of computer networks. Sharing of | | | | equipments used in the mobile wireless systems |
| information, sharing of resources (both software | | | | include personal digital assistants (PDAs), smart |
| and hardware) and sharing of processing load are | | | | phones and pager with Internet access.Wireless |
| some of the major objectives of a computer | | | | networks communicate by modulating radio |
| network. One of the recent trends in the | | | | waves or pulsing infrared light. A wireless |
| computer and communication industries is wireless | | | | networking router is linked to the wired network |
| communication. A wireless network does not use | | | | infrastructure by stationary transceivers. Wireless |
| cables, but instead uses radio waves. Such | | | | communication technologies used in wireless |
| networks enhance the functionality of computing | | | | networks include analog cellular, digital cellular, |
| devices by freeing them from the location | | | | Cellular Digital Packet Data (CDPD), mobile radio |
| constraints of a wired network. Although wireless | | | | networks, personal communication services (PCS), |
| networking is of great use to the laptop users | | | | satellite, microwave systems and local multipoint |
| who move from one location to the other | | | | distribution systems (LMDS). Although the data |
| throughout the day, there are benefits for fixed | | | | rates supported by analog cellular technology are |
| users as well. Many schools and businesses have | | | | low, it is the most popular methods for wireless |
| an architecture that is unsuited for a wired | | | | data communications due to the wide availability |
| network. Wired networking is very cost effective | | | | of modems and analog cellular services. The |
| in such environments.Wireless networks can be | | | | commonly used wireless technologies include 2G |
| broadly classified as fixed wireless systems and | | | | and 3G technologies, wireless LANs, Wireless Local |
| mobile wireless systems. A fixed wireless system | | | | Loops (WLLs), radio-router technology, Multihop |
| supports a little or no mobility of the equipment | | | | wireless network and Wireless Application Protocol |
| related to the wireless network. For example, a | | | | (WAP). |
| local area network can be set up using wireless | | | | |