Network Broadcasts
there are a lot of ways to shout at people nodes
unicast vs broadcast vs anycast vs multicast
| Casting Method | Who are we yelling at? | How? | Group Address |
|---|---|---|---|
| Unicast | One specific node | - | - |
| Broadcast | Everyone in the broadcast domain | - | ff:ff:ff:ff:ff:ff last IPv4 address in the subnet |
| Multicast | Nodes that have joined a multicasting group using IGMP | Using a switch capable of IGMP snooping | 224.0.0.0 - 239.255.255.255 (IPv4)special MAC address prefixed with 01-005E |
| Anycast | A group of hosts with the same IP address | Using a specialized forwarding protocol used by the router | - |
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