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PACKET SWITCHES:
To span large distances or several computers, networks must removed shared phase with packet switches. Each switch moves whole packet from one connection to another. That's why they are known as packet switches. A packet switch consists of a small device with network interfaces, a storage and a program dedicated to packet switching application.
A packet switch is given in the figure below.
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When the computers on the network basically listen and receive the signal, they are referred to as passive due to they don't amplify the signal in any way.
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