Final answer:
The network transmission method where packets are sent from one host to all other hosts is described as Broadcast (D). This method allows for simultaneous message delivery to all nodes on a network segment.
Step-by-step explanation:
The term that describes the network transmission method where packets are sent from one host to all other hosts is D) Broadcast. In broadcast transmissions, a single sender transmits messages to all potential receivers within the network segment.
This method is commonly used in local area networks (LANs) to reach all nodes at once, for example, when trying to find out which devices are currently connected to the network through an ARP broadcast.