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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 radio waves. It enables the
                                           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 an 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 meters. Bluetooth  is used in many
                  places, like in barcode scanners, traffic control devices, mobile phones, hands, free headsets and wireless
                  connections 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 regularising the bandwidth.

                   42    Touchpad Computer Applications (Ver. 2.0)-IX
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