As described earlier in this book, one of the main drawbacks of network hubs is that when there is a collision on the wire, the damaged frame is sent to all connected devices. One of the advantages of modern switches is that each port on the switch is considered a collision domain. In the event of a collision (which is not possible in full-duplex environments), the damaged frame does not pass through the interface.
Switches do not separate broadcast domains, routers do. If a switch receives a frame with a Broadcast destination address, then it must forward it out . . .
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