Modem

What is a Modem?

• Short for Modulator/Demodulator.
• Converts analog signals to digital and vice versa.
• Connects the computer to the internet.
• The signals that used for transmission through cables are analog.
• The computer can process only digital signals. So has to be converted to digital which is done by the modem.

Why do we need a modem?

• The signals that are used for transmission of information across the cables are analog signals.
• Computer can operate through digital signals and the signals we get through cable are analog. So it has to be converted using a modem.

What is the difference between modem and router?

• Router connects different devices and directs the information collected by the modem.
• Now a days most devices come with router and modem both combined in a device.

Is modem mandatory or optional?

• Depending on the Internet Service Provider and their delivery system we may require a modem or we dont.
• Most service providers provide them during connection and depending on service providers the modem may be required or may not.