Which one of the following devices allows a computer to communicate with other computers via the phone lines?
A. Mouse
B. Modem
C. Monitor
D. Keyboard
B. Modem
The correct answer is B. Modem.
A modem is a device that allows a computer to communicate with other computers via the phone lines. It acts as a translator, converting digital information from the computer into analog signals that can be transmitted over the phone lines, and then converting the analog signals back into digital information at the receiving end. This enables computers to establish connections and exchange data over telephone networks.