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

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Q: 57 (IAS/2011)
What is the difference between Bluetooth and Wi-fi devices ?

question_subject: 

Science & Technology

question_exam: 

IAS

stats: 

0,86,177,86,32,93,52

keywords: 

{'bluetooth technology': [0, 0, 0, 1], 'bluetooth': [0, 0, 0, 2], 'fi devices': [0, 0, 0, 1], 'wireless local area networks': [0, 0, 0, 1], 'devices': [0, 1, 0, 7], 'fi technology': [0, 0, 0, 1], 'wlan': [0, 0, 0, 1], 'ghz radio frequency band': [0, 0, 0, 1], 'wireless wide area networks': [0, 0, 0, 1], 'ghz': [0, 0, 0, 1], 'ghz frequency band': [0, 0, 0, 2], 'wwan': [0, 0, 0, 1], 'wi': [0, 0, 1, 2]}

Option 1 is correct. Bluetooth does use 2.4 GHz radio frequency, while Wi-Fi can operate on both 2.4 GHz and 5 GHz frequencies. This difference in frequencies used can influence the range, speed, and robustness of the wireless connection.

Option 2, however, is incorrect. Both Bluetooth and Wi-Fi can be used for creating Local Area Networks (LANs), not just Bluetooth. Also, Wi-Fi isn`t restricted to Wireless Wide Area Networks (WWAN); it is also often used for LANs.

Option 3 is also incorrect. Both Bluetooth and Wi-Fi technology do not require a line of sight for information transmission to occur between devices. They utilize radio waves, which can travel through most objects, unlike, for instance, infra-red technology which does require a line of sight.

Option 4 is also incorrect because it suggests that both options 1 and 2 are correct when, in fact, only option 1 is correct.