Networking Devices


All the hardware devices that is needed to develop a computer network is known as networking devices.

Few networking devices are:

  • Modem
  • Hub
  • Switch
  • Router
  • Repeater
  • Bridge
  • Gateway

We will read about basic functionalities of each one of them one by one.



Modem is a hardware networking device which is used to convert digital signals to analog signals and vice versa.

Modem is abbreviation for Modulator-Demodulator.

Modem first converts the digital signal to analog signal so that it can be transmitted easily over analog transmission channel like telephone lines. It again converts the incoming analog signal to digital signal at the receiving end.


Modulation is the process of converting digital signal into analog signal.

Demodulation is the process of converting analog signal into digital signal.

Types of Modem

  1. Internal Modem→ It is fixed on computer motherboard
  2. External Modem→ It is connected as external entity with the computer.

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