Network devices are components used to connect computers or other electronic devices together so
that they can share files or resources like printers etc.
Modem: Modem
stands for Modulator-Demodulator. It is used
to connect computers for communication via telephone lines.
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| Modem |
Hub:
It works at the Physical layer. It just acts
like a connector of several
computers i.e. simply connects all the devices on its ports together. It
broadcasts all the data packets arriving at it with no filtering capacity.
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| Hub |
Switch:
It works at the Data Link Layer. It is used
for dividing a network into segments
called subnets. It provides filtering of data packets and prevents network
traffic also.
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| Switch |
Repeater:
It operates at the Physical Layer. It is used
to amplify a signal that has lost
its original strength so as to enable them to travel long distances.
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| Repeater |
Router:
It works at the Network Layer and is used to connect different networks that have
different architectures and protocols. It sends the data packets to desired
destination by choosing the best path available thus reducing network traffic.
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| Router |
Gateway:
It operates in all the layers of the network architecture. It can be used to
connect two different networks having different architectures, environment and
even models.
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| Gateway |
Bridge:
They are used two connect two LANs with the
same standard but using different
types of cables. It provides an intelligent connection by allowing only desired
messages to cross the bridge thus improving performance. It uses physical
addresses of the packets for this decision.
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| Bridge |
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