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Fiber optic cable is the most reliable but expensive and fragile networking cable. Using optical fiber, one
can achieve a bandwidth of 20 Ghz and a transmission rate upto 10 Gbps.
Wireless/Unguided
It includes communication that takes place with the help of non-physical identity or wireless medium like:
l Radiowave (Bluetooth, Wi-Fi, etc.)
l Microwave (Mobile/ Cellular Communication, Satellite, etc.)
l Infrared (T.V. Remote Control, Motion Sensor device, etc.)
Bluetooth
It is a wireless connectivity that takes place through radiowaves. It enables to
exchange information between devices like mobile phones, laptops, personal
computers, printers, etc. over a private short range network. The network
connection takes place through bluetooth dongle or inbuilt bluetooth transmitter
present in the mobile or other computer devices. The connectivity through
bluetooth consumes less power, and consists of low-cost transceiver microchips.
The physical range for communication in Bluetooth is up to 100 metres. Bluetooth is used at many places,
like in bar code scanners, traffic control devices, mobile phones, hands free headsets, wireless connection
of a PC with input and output devices.
Do you know?
The Bluetooth specifications are developed and licensed by the Bluetooth Special Interest Group (SIG).
IEEE (Institute of Electrical and Electronics Engineers) standard for Bluetooth is IEEE 802.15.1
Wi-Fi
Wi-Fi (Wireless Fidelity) is a network of wireless connection that takes place through radio frequency(RF). Wi-
Fi uses the same radio frequency as Bluetooth, but with more power, resulting into a stronger connection.
Wi-Fi is sometimes called ‘Wireless Ethernet’. Wi-Fi is supported by many applications and electronic gadgets
including video game consoles, home networks, PDAs, tablets, mobile phones, I-Pad, I-Pod, etc.
Many companies or institutions make their campus a Wi-Fi zone i.e. in which PCs, PDAs, etc. in the campus
can connect to the network which is aligned to Internet.
To form a wireless computer network, a Wi-Fi adaptor (802.11 b/g) is required for each terminal. For
establishing connections in a local area, access points are installed which increases and coordinates the
frequency of transmission and helps in regularizing the bandwidth.
42 Touchpad Computer Applications-IX

