Which technology is used for wireless communication over short distances?

The correct answer is Bluetooth. This technology is specifically designed for wireless communication over short distances, typically ranging from a few centimeters to about 100 meters, depending on the Bluetooth version and the devices used. Bluetooth enables devices such as smartphones, headphones, speakers, and computers to connect and exchange data wirelessly, making it ideal for personal area networks (PANs).

Other technologies listed have different uses: Ethernet refers to wired networking and is primarily used for local area networks (LANs), providing a stable and high-speed connection through cables. Fiber optics is also a wired technology that uses light to transmit data at high speeds over long distances, making it suitable for broadband connections rather than short-range wireless communication. LAN refers to a network that connects computers and devices in a limited area, typically using Ethernet cables, rather than focusing on short-range wireless communication.