Which wireless technology is designed for short-range communication between devices?

Which wireless technology is designed for short-range communication between devices?

• A. Bluetooth
• B. Wi-Fi
• C. NFC
• D. Zigbee

Answer: (A)

Bluetooth is built for short-range wireless links between devices. It targets personal-area networking, letting devices pair quickly and communicate within close proximity—typically around 10 meters for common consumer gear, with very low power usage. This makes it ideal for connecting peripherals like headphones, keyboards, mice, and smartphones without needing a Wi-Fi router or network infrastructure. In contrast, NFC operates at an even shorter range (a few centimeters) and is used for quick taps and secure exchanges. Wi-Fi is designed for higher data rates and broader coverage, suitable for local networks across larger areas. Zigbee focuses on low-power, mesh networking for sensors and home automation, where many devices may form a network over a modest distance, not just direct device-to-device links. So, the description matches Bluetooth’s purpose: facilitating short-range, direct communication between nearby devices.

Bluetooth is built for short-range wireless links between devices. It targets personal-area networking, letting devices pair quickly and communicate within close proximity—typically around 10 meters for common consumer gear, with very low power usage. This makes it ideal for connecting peripherals like headphones, keyboards, mice, and smartphones without needing a Wi-Fi router or network infrastructure.

In contrast, NFC operates at an even shorter range (a few centimeters) and is used for quick taps and secure exchanges. Wi-Fi is designed for higher data rates and broader coverage, suitable for local networks across larger areas. Zigbee focuses on low-power, mesh networking for sensors and home automation, where many devices may form a network over a modest distance, not just direct device-to-device links.

So, the description matches Bluetooth’s purpose: facilitating short-range, direct communication between nearby devices.