SSC CHSL 12 Aug 2021 Shift 3 Paper

A device or program that enables a computer to transmit data over telephone or cable lines is called Modem. A modem (modulator-demodulator) modulates and demodulates electrical signals sent through phone lines, co-axial cables, on other types of wiring. In other words, it transforms digital information from computer into analog signals that can transmit over wires.