Name a common wireless communication technology.

• A. Ethernet
• B. Bluetooth
• C. Optical fiber
• D. Dial-up

Answer: (B)

Bluetooth is a widely used wireless communication technology that enables devices to connect and exchange data over short distances, typically up to about 30 feet (10 meters). Its applications are extensive, ranging from connecting peripherals like keyboards and mice to pairing with smartphones and audio devices. Bluetooth operates in the 2.4 GHz frequency band and is valued for its ease of use, low power consumption, and ability to create short-range networks.

In contrast, Ethernet is a wired communication technology typically used for local area networking (LAN), while optical fiber refers to a method of transmitting data as light signals through fiber optic cables, which is also a wired technology. Dial-up is an older method of connecting to the internet using telephone lines, which is slow compared to modern standards and does not fall under wireless communication technologies. Hence, Bluetooth clearly stands out as the correct choice among the provided options.