Final answer:
Multicast addressing sends a single packet to multiple computers by replicating the packet to reach all the computers in a specific group.
Step-by-step explanation:
The type of addressing that sends a single packet to multiple computers is called multicast addressing.
In multicast addressing, a single packet is sent from a source to a specific group of destination computers. The packet is replicated by network routers and switches to reach all the computers in the group.
For example, in video streaming applications, multicast addressing is used to send a video stream to multiple viewers simultaneously without consuming a large amount of network bandwidth.