Final answer:
Multicast is the type of message that is sent to a specific group of hosts. Unlike Unicast and Broadcast, Multicast is a targeted communication to a select group of hosts.
Step-by-step explanation:
The type of message that is sent to a specific group of hosts is called Multicast.
Multicast is a communication method where a single message is sent to multiple recipients who have joined a specific multicast group.
Unlike Unicast, which sends a message to a specific individual host, and Broadcast, which sends a message to all hosts on a network, multicast is a targeted communication to a select group of hosts.