Wireless networking is the technology that enables two or more computers to communicate using standard network protocols, but without network cabling. Wireless WANS & LANs is the technology that has emergence of cross-vendor industry standards such as IEEE 802.11, has produced a number of affordable wireless solutions that are growing in popularity with business, homes and schools as well as sophisticated applications where network wiring is impossible.
Types of Wireless Networks:
Peer-to Peer Networking: Computers or laptops connected together via a wireless device such as a router with the ability of sharing files, printers and internet connection on a local area network (LAN).
Hardware Access Point : Computers or laptops connected together via a wireless access point on a local area network (LAN).
Wi-Fi Wireless Networks: Allows mobile devices, such as laptop computers and personal digital assistants (PDAs) to connect to local area networks and is often used for Internet access. Desktop computers can also use Wi-Fi, allowing offices and homes to be networked without expensive wiring. Many computers are sold today with Wi-Fi built-in; others require adding a Wi-Fi network card. The geographical region covered by one or several access points is called a hotspot . The range of an access point varies. The access point built into a typical Wi-Fi home router might have a range of 45 m (150 ft) indoors and 90 m (300 ft) outdoors.
Broadband wireless access is a technology aimed at providing wireless access to data networks , with high data rates. According to 802.16-2004 standard, broadband means 'having instantaneous bandwidth greater than around 1 MHz and supporting data rates greater than about 1.5 Mbit /s'. From the point of view of connectivity, broadband wireless access is equivalent to broadband wired access, such as ADSL or cable modems . It is planned to be used in the next few years and is thought to be used up to 40 miles away. Most widely used technologies are LMDS and MMDS .One particular broadband wireless access technology is being standardized by IEEE 802.16 (WiMAX).
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