Computer Science for IGCSE & O level - Data Transmission (Section 3 - No. 19)
What is the primary function of a "modem"?
To encrypt data.
To connect to the internet.
To convert digital signals to analog signals and vice versa.
To provide power to the computer.
Giải thích
A modem modulates and demodulates signals, enabling digital devices to communicate over analog lines (like phone lines).