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HUB tutorials

  • Hub is used to connect multiple computers to a local area network.

  • It is available in 8 / 16 / 24 / 48 ports capacity and speed wise 10 mbps, 100 mbps.

  • A standard repeating hub takes incoming traffic and repeats it across all ports regardless of the intended destination.

  • Biggest problem of hub is that it uses shared technology.

  • This means that all devices have equal opportunity to transmit information on the LAN and that all devices are trying to get their share of time to transmit.

  • As number of devices connected to hub increases, performance quickly degrade.

  • Second problem is that it takes incoming traffic and then sends it across to all port regardless of destination port.

  • In following example if source computer wants to send data to only one destination computer, traffic will be send to all connected ports, irrespective of destination port. So all port receives traffic and then it will be forfeited.

  • This leads to traffic conjunction and increase in collisions.




  • Note:- As you can imagine, using large hub say 24 ports can severely impact the network performance, because all the devices must listen to other device and then wait to transmit data till all the other traffic has stopped.

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