Question

what is hot spot easy define

Answer 1

Hot spot is the option for sharing internet with other devices.

Answer 2

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HERE IS YOUR ANSWER
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For users of portable computers equipped for wireless, a hot spot (orhotspot) is a wireless LAN (local area network) node that provides Internet connection and virtual private network (VPN) access from a given location. A number of companies such as Sprint and Cometa plan to provide a nationwide network of hot spots.