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The electromagnetic spectrum is the range of all frequencies of electromagnetic radiation

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It is a system for sending data over computer networks that uses radio waves.

Modern laptops use built-in internal Wi-Fi wireless card, but desktop computers may require a Wi·Fi USB adapter or a Wi·Fi network card.

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-Bluetooth relies on short-range radio frequency, and any device that incorporates the technology can communicate as long as it is within the required distance.

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receive the signal from the line provided by the telephone cornpany and distribute it to the Wi-Fi receiver devices within their reach.

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Act as remote transmitters: they are used in locations that the router's Wi-Fi signal cannot reach.

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-This technology is normally used by personal computing devices, such as mobile phones and laptops.

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-Infrared technology uses a transmission technique based on the light waves that move within the infrared spectrum.

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-Maximum distance: one metre.