Wireless technologies conform to a variety of standards and offer varying levels of warrantor features. The principal advantages of standards ar to encourage mass production and to resign products from multiple vendors to interope regularise. wireless local area networks are based on the IEEE 802.11 standard, which the IEEE first highly-developed in 1997. The IEEE designed 802.11 to support medium-range, higher data rate applications, such as Ethernet networks, and to address mobile and portable stations.
The collar physical implementations are:1.Direct sequence spread spectrum radio (DSSS) in the 2.4 GHz band,2.Frequency hopping spread spectrum radio (FHSS) in the 2.4 GHz band, and3.Infrared put down (IR).
The types (modes) of The 802.11 standard:1- Ad Hoc Wireless LANsThe 802.11 standard is defined as ?Independent radical Service Sets? or IBSSs. A Basic Service Set (BSS) is a collection of stations that are either strictly within range of cardinal some other and communicating amongst themselves without an AP or a group of stations associated with one AP. An IBSS is a BSS where stations communicate without an AP. Each BSS and IBSS is identified by a BSS identifier (BSSID) that is formatted the same as a WLAN NIC addresses (a 48 bit number). Each frame transmitted within an 802.11 WLAN implys the destination BSSID.
A common misconception is that Ad Hoc networks cannot be connected to pumped(p) networks. However, Ad Hoc networks can be connected to wired networks.
The moreover restriction is that there can be only one IBSS and no roaming is possible. (3 Com. (2000))Bluetooth:Bluetooth has emerged as a very popular ad hoc network standard today. The Bluetooth standard is a figure and telecommunications industry specification that describes how mobile phones, computers, and PDAs should interconnect with each other, with office and business phones, and with computers using short-range wireless connections. Bluetooth network applications include wireless synchronization, e-mail/Internet/intranet access...
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