a datagram to be forwarded normally to the specified destination (sub-)net and then broadcast on the final hop

a frame sent to the subnet broadcast address on a remote IP subnet

an IP broadcast to all devices within a single directly-attached network or subnet

a packet containing all ones (or in some cases, all zeros) in the host portion of the destination IP address

a packet sent to a specific network or series of networks, and a flooded broadcast is a packet sent to every network