![]() For instance, when R1 receives a broadcast on its Gigabit Ethernet 0/0 interface, it does not forward out another interface. When a router receives a broadcast, it does not forward it out other interfaces. Routers Segment Broadcast Domains Routers Segment Broadcast Domains For example, if a switch in the figure were to receive a broadcast, it would forward it to the other switches and other users connected in the network. Switches propagate broadcasts out all interfaces except the interface on which it was received. A host typically acquires its IPv4 address configuration using the Dynamic Host Configuration Protocol (DHCP) which sends broadcasts on the local network to locate a DHCP server. Devices on Ethernet LANs also locate other devices using services. ARP sends Layer 2 broadcasts to a known IPv4 address on the local network to discover the associated MAC address. In an Ethernet LAN, devices use broadcasts and the Address Resolution Protocol (ARP) to locate other devices. Sometimes, only a segment of the population needs to read that information. But often a broadcast is not really pertinent to everyone in the mailing list. Hopefully, it contained information that each of you needed to know. Have you ever received an email that was addressed to every person at your work or school? This was a broadcast email. ![]()
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