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Ict Advancement Essay

1785 words - 7 pages

Wireless networkWireless network refers to any type of computer network that is not connected by cables of any kind. It is a method by which homes, telecommunications networks and enterprise (business) installations avoid the costly process of introducing cables into a building, or as a connection between various equipment locations. Wireless telecommunications networks are generally implemented and administered using a transmission system called radio waves. This implementation takes place at the physical level (layer) of the OSI model network structure.
Contents
1 Types of wireless networks
1.1 Wireless PAN
1.2 Wireless LAN
1.3 Wireless mesh network
1.4 Wireless MAN
1.5 Wireless WAN
1.6 Mobile devices networks

Types of wireless networksWireless PANWireless personal area networks (WPANs) interconnect devices within a relatively small are, that is generally within a person's reach For example, both Bluetooth radio and invisibleinfrared light provides a WPAN for interconnecting a headset to a laptop. ZigBee also supports WPAN applications.[4] Wi-Fi PANs are becoming commonplace (2010) as equipment designers start to integrate Wi-Fi into a variety of consumer electronicDevices. Intel "My WiFi" and Windows 7 "virtual Wi-Fi" capabilities have made Wi-Fi PANs simpler and easier to set up and configure.Wireless LANA wireless local area network (WLAN) links two or more devices over a short distance using a wireless distribution method, usually providing a connection through an access point forInternet access. The use of spread - spectrum or OFDM technologies may allow users to move around within a local coverage area, and still remain connected to the network.Products using the IEEE 8 02.1 1 WLAN standards are marketed under the Wi-Fi brand name. Fixed wireless technology implements point-to-point links between computers or networks at two distant locations, often using dedicated microwaveor modulated laser light beams over line of sight paths. It is often used in cities to connect networks in two or more buildings without installing a wired link.Wireless mesh networkA wireless mesh network is a wireless network made up of radio nodes organized in a mesh topology. Each node forwards messages on behalf of the other nodes. Mesh networks can "self heal", automatically re-routing around a node that has lost power.Wireless MANWireless metropolitan area networks are a type of wireless network that connects several wireless LANs.WiMAX is a type of Wireless MAN and is described by the IEEE 802.16 standard.[6]Wireless WANWireless wide area networks are wireless networks that typically cover large areas, such as between neighboring towns and cities, or city and suburb. These networks can be used to connect branch offices of business or as a public internet access system. The wireless connections between access points are usually point to point microwave links using parabolic dishes on the 2.4 GHz band, rather than unidirectional used with smaller networks. A...

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