A wireless technology built in electronic gadgets used for exchanging data over short distances is?

The correct answer is Bluetooth because Bluetooth is specifically designed as a short-range, low-power wireless communication standard for personal area networks (PANs).

• Step 1 (Technical Definition): Bluetooth utilizes short-wavelength UHF radio waves (in the 2.4 GHz ISM band) to transfer data securely across brief physical spans, typically stretching from a few inches up to roughly 30 feet (10 meters).


• Step 2 (Application): This architecture is optimized for connecting peripheral accessories like wireless headphones, mice, keyboards, and smartwatches directly to host gadgets without consuming heavy battery power.


• Incorrect Options:
  
  
  
  • Wifi is incorrect because Wi-Fi is engineered for broader Local Area Networks (LANs), providing high-speed internet access across whole rooms or buildings over larger distances.
  
  
  • Modem is incorrect because a modem is a physical hardware network device that modulates and demodulates analog and digital signals to establish internet connections over lines.
  
  
  • USB is incorrect because Universal Serial Bus (USB) is fundamentally a physical, wired cable connection interface, not a wireless radio protocol.