## Invitation to Computer Science 8th Edition

Node A sends the message on LAN1, where every node receives it, but only bridge $\mathrm{B} 1$ keeps it. All other nodes discard it because it is not addressed to them. Bridge $\mathrm{B} 1$ removes the message from LAN1 and rebroadcasts it on LAN2. Every node on LAN2 receives the message, but again, only bridge $\mathrm{B} 2$ keeps it. All others discard it. Bridge $\mathrm{B} 2$ knows that node $\mathrm{B}$ is located on LAN3, so it rebroadcasts the message on LAN3, where node $\mathrm{B}$ receives it, recognizes its own address, and removes the message from the network. The message has arrived at its intended destination.
Node A sends the message on LAN1, where every node receives it, but only bridge $\mathrm{B} 1$ keeps it. All other nodes discard it because it is not addressed to them. Bridge $\mathrm{B} 1$ removes the message from LAN1 and rebroadcasts it on LAN2. Every node on LAN2 receives the message, but again, only bridge $\mathrm{B} 2$ keeps it. All others discard it. Bridge $\mathrm{B} 2$ knows that node $\mathrm{B}$ is located on LAN3, so it rebroadcasts the message on LAN3, where node $\mathrm{B}$ receives it, recognizes its own address, and removes the message from the network. The message has arrived at its intended destination.