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tjieFlag for United States of America asked on

HUB vs Switch

Hi,

1) This is related to Hub vs Switch
2) Would somebody explain the difference between HUB and SWITCH? ( I forgot somewhere)
3) Please explain it with your own wording
4) Thank you

tjie
RoutersSwitches / HubsHardware Firewalls

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peea

8/22/2022 - Mon
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Muhammad Ahmad Imran

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Jimmy Larsson, CISSP, CEH

Many of the answers above talks about hubs that repeats the packets. That is not true. A hub doesnt know about packets. A hub simply copies and repeats the electrical signals (layer 1). While a switch reads, interpretes and rebuilds packets, a hub sends the incoming signal out on all other ports again, for bad and for worse. This means that the signal-to-noise-ratio isnt reduced by a hub, but with a switch.

Compare it to a hard copy device that takes the original piece of paper, scans it and prints it again. After doing this over and over you will loose quality. Black dots and so on. In this comparizon a switch would be like reading the words on the piece of paper, writing them into your favourite word processor and print a brand new copy with the same content as the original, but without noise.

/Kvistofta
peea

Basically, from the view of point of architecture, the traffic between each pair of ports on a hub is SHARED, whereas it is DEDICATED for a switch.

From the network and security perspective, all ports on a hub are on the SAME physical link, therefore each node can listen everything even the traffic to other nodes. Therefore it is vulnerable. A switch provides DEDICATED link for each pair of nodes, that's why it is called switch.

Just my two cents. :)
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