What is the difference between Bluetooth 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
Explanation
Option (a) is correct
- Bluetooth and Wi-Fi are wireless communication technologies that operate using radio waves, but they differ mainly in the frequency bands they use and their typical applications. Bluetooth primarily operates in the 2.4 GHz radio frequency band and is designed for short-range communication between devices such as mobile phones, wireless earphones, keyboards, and speakers. In contrast, Wi-Fi can operate in both the 2.4 GHz and 5 GHz frequency bands (and newer standards also use the 6 GHz band), enabling faster data transmission over relatively larger distances.
- Statement 2 is incorrect because Wi-Fi is used for Wireless Local Area Networks (WLANs), allowing devices within a limited area (such as homes or offices) to connect to the internet. Wireless Wide Area Networks (WWANs) refer to cellular networks such as 4G or 5G, not Wi-Fi.
- Statement 3 is also incorrect because neither Bluetooth nor Wi-Fi requires a line-of-sight connection. Both technologies use radio waves and can transmit signals through obstacles like walls, although the range of Bluetooth is generally shorter.
