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Broadcast Domain




More specifically it is an area of the Computer Network made up of all the Computer s and networking devices able to be reached by sending a frame to the Data Link Layer broadcast address.

In a very basic network where hubs are used to connect the computers, rather than switches or routers, you could say
it's pretty much like the post office clerk checking the mail. One clerk has to look at mail every time to confirm that the mail is not for himself/herself. So when one mail (signal) is sent from one point, all the other points in the network will have to check in order to confirm that the mail (signal) is not for themselves.

router and VLAN can segment broadcast domain.

Compare with Collision Domain .