e.g : cellular telephone, tabs, wireless networking, satellite television, GPS units
Uses of Wireless - mobile users can access email anywhere anytime'
- travelers with portable computer can connect to internet through base station
↙ ↘
railway station airport
Types: 1) Wireless Wide Area Network (WWANs)
2) Wireless Metropolitan Area Network (WMANs)
3) Wireless Local Area Network (WLANs)
4) Wireless Personal Area Network (WPANs)
Wireless Technology : Infrared Bluetooth WLANs Broadband Wireless WiMax WiFi
Infrared: - send data as infrared light rays in short distance
- do not use signal in radio frequency
Bluetooth: - designed for very short range < 10m
- connect and exchange information between devices such as mobile phones, laptops, PCs, printers, digital cameras
WLANs: - vary from simple, independent, peer-to-peer connections between a set of PCs to more
complex, intra-building infrastructure networks
- wireless solutions → point-to-point solution: bridge between two local area networks
: to provide alternative to cable between two distant locations
→ point-to-multi-point solution: connect several, separate location to
one signal location
WiMax: - provides access to internet to fixed location with large coverage
- speed up 70Mbps, range 30 miles
- extent range of wireless network
Wired vs. Wireless Network
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