Which technology creates a personal area network over 2.4 GHz to enable wireless connectivity?

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Multiple Choice

Which technology creates a personal area network over 2.4 GHz to enable wireless connectivity?

Explanation:
Bluetooth is designed to create a personal area network over the 2.4 GHz spectrum to enable wireless connectivity. It operates in the 2.4 GHz ISM band, supporting short-range links between devices such as phones, headphones, keyboards, and mice. It uses frequency-hopping spread spectrum to minimize interference and keeps power consumption low, which is ideal for battery-powered gadgets. This combination—a short-range wireless network that interconnects multiple devices—defines a personal area network. NFC works at 13.56 MHz and requires very close proximity, mainly for quick data exchanges or secure authentication, not for forming a PAN. RFID is used for identification and tracking and utilizes various frequencies, but it isn’t meant to create a device-to-device network for general connectivity. Infrared data transfer uses light, needs line-of-sight, and does not operate on 2.4 GHz.

Bluetooth is designed to create a personal area network over the 2.4 GHz spectrum to enable wireless connectivity. It operates in the 2.4 GHz ISM band, supporting short-range links between devices such as phones, headphones, keyboards, and mice. It uses frequency-hopping spread spectrum to minimize interference and keeps power consumption low, which is ideal for battery-powered gadgets. This combination—a short-range wireless network that interconnects multiple devices—defines a personal area network.

NFC works at 13.56 MHz and requires very close proximity, mainly for quick data exchanges or secure authentication, not for forming a PAN. RFID is used for identification and tracking and utilizes various frequencies, but it isn’t meant to create a device-to-device network for general connectivity. Infrared data transfer uses light, needs line-of-sight, and does not operate on 2.4 GHz.

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