A hub is a network connection device. It typically has four or more ports that can be connected to networked devices (most commonly ethernet devices).
All of the ports in a hub are equal.
The function of a hub is to take anything that comes in one port, and send it out to all the others. That’s it. Every computer connected to the hub “sees” everything that every other computer on the hub sees.
A hub does not examine the data that it is receiving and transmitting; it is purely a pass-through device.
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