Computer Science for IGCSE & O level - Hardware (Section 20 - No. 21)
Which device is used to convert signals from a cable (like coaxial or fiber optic) into a format that computers can understand?
Router
Switch
Modem
Network Interface Card (NIC)
Giải thích
A modem converts the signal from a cable (coaxial, etc.) to a signal the computer can understand.