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Computer Studies

What is a modem? What are its types? Explain.

Computer Components

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Answer

A modem is a device that modulates outgoing digital signals from a computer or other digital devices to analog signals. It also demodulates the incoming analog signals and converts them to digital signals for the digital device.

Modems are of three types-

  1. Internal modem — These are attached to the internal slot of the motherboard. These are categorised as full duplex and half duplex which are used for fax and internet communications. They can also be used for data and voice communication.

  2. External modem — It is a small box connected to the communication port of the computer. It works similar to the internal modem. The only difference is that it is placed outside the CPU box.

  3. USB modem — It refers to any type of data/fax/voice modem device which can be connected to a computer using the USB port. It looks just like a USB flash drive but is smaller in size.

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