COMPUTER PERIPHERALS
MOBILE DEVICES AND SMARTPHONES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Wi-Fi
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Bluetooth
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NFC
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IR
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Detailed explanation-1: -Infrared has an operational range of about 1 meter. Near field communication (NFC) has a maximum range of about 10 centimeters. Wi-Fi depends on the standard, but it usually has a range of 30 meters or more. Bluetooth Class 2 devices can operate at about 10 meters.
Detailed explanation-2: -In opposition to standard wireless technologies referred to as “short-range”, long-range radio technologies allow devices to communicate over kilometers-wide distances at a low energy cost, but at the expense of a low data rate.
Detailed explanation-3: -Short-range wireless technologies include Bluetooth, Wi-Fi, near-field communication (NFC), LPWAN, ultra-wideband (UWB) and IEEE 802.15. 4. They are implemented by chips fabricated as RF CMOS integrated circuit (RF circuit).