Which short-range wireless personal area network supports low-power, long-use IoT needs?

Which short-range wireless personal area network supports low-power, long-use IoT needs?

• A. NFC
• B. BLE(Bluetooth low energy)
• C. Zigbee
• D. Wi-Fi Direct

Answer: (B)

Low power operation for short-range personal area networks is achieved with Bluetooth Low Energy. It is specifically designed to minimize energy consumption by keeping devices in sleep modes and only waking briefly to transmit small data packets, which yields long battery life—months or even years—for sensors, beacons, and wearables. This makes it ideal for IoT needs that require devices to run long between charges while still communicating effectively with other devices, including smartphones. NFC, by contrast, is extremely short-range and typically power-passive, suitable for quick, short exchanges rather than continuous IoT data over extended periods. Zigbee is also low power and well-suited for mesh networks in home automation, but BLE advantages include simpler pairing and broad smartphone compatibility, plus direct connectivity without an extra hub in many cases. Wi-Fi Direct uses significantly more power, which does not fit long-use, low-power IoT requirements.

Low power operation for short-range personal area networks is achieved with Bluetooth Low Energy. It is specifically designed to minimize energy consumption by keeping devices in sleep modes and only waking briefly to transmit small data packets, which yields long battery life—months or even years—for sensors, beacons, and wearables. This makes it ideal for IoT needs that require devices to run long between charges while still communicating effectively with other devices, including smartphones.

NFC, by contrast, is extremely short-range and typically power-passive, suitable for quick, short exchanges rather than continuous IoT data over extended periods. Zigbee is also low power and well-suited for mesh networks in home automation, but BLE advantages include simpler pairing and broad smartphone compatibility, plus direct connectivity without an extra hub in many cases. Wi-Fi Direct uses significantly more power, which does not fit long-use, low-power IoT requirements.