25. A wireless technology built in electronic gadgets used for exchanging data over short distances is ______ A.USB B.Bluetooth C.Modem D.Wifi E.None of these
Option B Solution: Bluetooth is a wireless technology standard for exchanging data over short distances (using short-wavelength UHF radio waves in the ISM band from 2.4 to 2.485 GHz) from fixed and mobile devices, and building personal area networks (PANs). Invented by Dutch electrical engineer Jaap Haartsen, working for telecom vendor Ericsson in 1994.
