Submitted by MIS on
The common Ethernet hub simply broadcasts each message it receives to every one of its ports. We may compare it to a loudspeaker.
Each Ethernet device also has to wait for its turn to ‘talk’ to the hub, increasing the probability of message collisions; therefore, real-time operation is jeopardized and determinism is difficult.
Alternatively, a switch automatically determines and remembers where an Ethernet device is located and routes messages only through the appropriate port. This minimizes network loading and enables true deterministic communications over Ethernet.
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