eli5:what is broadcast address how is it used in layer 2 and layer 3 of osi model?
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A broadcast address is the last legal address within a subnet and it is used to send a packet to all IPs within that subnet.
Imagine you live in a house on a Baker street. That house will have a mailing address, and that mailing address works very similarly to an IP address. You use it to send and receive packets to the right house.
Imagine the Post office had a mechanism for flyers where if you sent a flyer to 9999 Baker street, the post man would deliver a copy of that flyer to every house on the street. That’s basically how a broadcast address works.
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