pyq/2011/prelims/57

What is the difference between Bluetooth and Wi-Fi devices?

(A) Bluetooth uses a 2.4 GHz radio frequency band, whereas-Wi-Fi can use 2.4 GHz or 5 GHz frequency band.

(B) Bluetooth is used for Wireless Local Area Networks WLAN only, whereas Wi-Fi is used for Wireless Wide Area Networks WWAN only.

(C) When information is transmitted between two devices using Blue-tooth 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

(D) The statements a and b given above are correct in this context