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The range of all frequencies of electromagnetic radiation

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

The maximum distance is one metre

An example of a device that use ir is movile phones

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1. 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.

Examples of devices that use ir are mobile phones and laptops.

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1. Wi-Fi is a system for sending data over computer networks that uses radio waves.

Examples of devices that use it are modern laptops and tablets

There are 2 devices to interconectWi-Fi:

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

b. Wireless access points (WAP): act as remote transmitters, they are used in locations that the router's Wi-Fi signal cannot reach.