Which of the following are common technologies of Wireless Personal Area Network (WPAN)?
Each correct answer represents a complete solution. Choose all that apply.

A.
GSM

B.
Infrared

C.
GPRS

D.
Bluetooth

Explanation:

Bluetooth is a proprietary open wireless protocol for exchanging data over short distances (using
short length radio waves) from fixed and
mobile devices, creating personal area networks (PANs).
Infrared is also one of the common technologies of Wireless Personal Area Network (WPAN).
Infrared imaging is used extensively for military
and civilian purposes. Military applications include target acquisition, surveillance, night vision,
homing, and tracking. Non-military uses include
thermal efficiency analysis, remote temperature sensing, short-ranged wireless communication,
spectroscopy, and weather forecasting.