UPSC Civil Services 2011 Prelims General Studies Paper I

Question : 57 of 100

Marks: +1, -0

What is the difference between Blue-tooth and Wi-Fi devices?

Bluetooth uses 2.4 GHz radio frequency band, whereas Wi-Fi can use 2.4 GHz or 5 GHz frequency band
Bluetooth is used for Wireless Local Area Networks (WLAN) only, whereas Wi-Fi is used for wireless wide area networks (WWAN) only
When information is transmitted between two devices using Bluetooth technology, the devices have to be in the line of sight of each other, but when Wi-Fi technology is used the devices need not be in the line of sight of each other
The statements (a) and (b) given above are correct in this context

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