Hub -- Home of the Spokes
Remember in the wildly popular Star network the wiring all came to a center point like a wagon wheel? Well at the center of the wagon wheel is the hub. Funny, that is exactly what the device that ties together all the wires is called, a hub. A hub takes all incoming network talk and re-transmits it to all the devices attached to it, then back out all the spokes. The intended recipient listens, while all the other devices ignore it. Sort of like someone getting called by a PA system at a store.
This brings up an interesting challenge. If there is too much chatter on the PA, all the devices spend a great deal of time listening to the PA about calls that aren't for them. And the PA is really busy. As the number of devices on a typical LAN increased, there needs to be a more efficient way of using bandwidth.
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