A single access point can support a small group of users and can function within a range of less than 100 to several hundred feet. The access point can be installed anywhere in the facility as long as good radio coverage is achieved.
Users equipped with handheld devices or notebook computers can transmit data to the access point "on campus." These user devices are equipped with WLAN adapters, usually in the form of radio network interface cards (NICs), installed in notebook computers, ISA or PCI adapters in desktop computers, or devices integrated into a handheld unit. These adapters provide a means of communication between the network operating system and the airwaves.
Who uses Wireless LANs?.
According to industry analysts Cahners-Instat, the wireless LAN industry will grow from $1.1 billion in 2000 to $5.2 billion by 2005, with significant growth potential for the future. The Dell 'Oro Group, also industry analysts, says the 802.11 WLAN market (including 802.11a and 802.11b technologies) grew 21 percent from the third quarter of 2001 to the fourth quarter, with revenues of $363.3 million. The benefits afforded by WLANs are generating this growth, and within a wide variety of industry segments. WLANs are increasingly popular in such environments as:.
• Corporate Information Systems - Network managers can move employees, set up temporary offices, install printers and other equipment without the cost and complexity of wires and cables. Executives can access vital company information from the boardroom through handheld devices equipped with WLAN cards .
• Retail - Store owners can equip employees with handheld devices to maintain real-time pricing and inventory information .
• Hospitality - Hotels and resorts can process guest reception information, process room service orders and track guest baggage .
• Education - Wireless communications among buildings reduces the cost and labor of wiring campuses.