gs1medium
What is the difference between Bluetooth and Wi-Fi devices?
- A.Bluetooth uses 2.4GHz 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 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
- D.The statements (a) and B. given above are correct in this context
▶ Answer & Explanation
Correct answer: A. Bluetooth uses 2.4GHz radio frequency band, whereas Wi-Fi can use 2.4 GHz or 5 GHz frequency band
Bluetooth technology operates in the 2.4 GHz ISM band, similar to one of the bands used by Wi-Fi. However, Wi-Fi standards also support the 5 GHz band, offering higher bandwidth and less interference. Bluetooth is primarily for short-range personal area networks (PAN), while Wi-Fi is designed for local area networks (LAN). The line-of-sight requirement is not a strict differentiator; while both technologies can be obstructed, neither strictly requires line of sight, though signal strength decreases with distance and obstacles.
Source: UPSC gs1 2011