Which of the following allows a central point to simultaneously address other points without addressing all of them?

Multicast uses special group addresses (224.0.0.0 to 239.255.255.255 in IPv4) to send a single stream of data to multiple interested receivers simultaneously without flooding all hosts. This makes it more efficient than broadcast for one-to-many communication to a targeted subset of network devices.

Subnetting is the process of dividing a network into smaller segments for addressing and routing purposes - it is not a data transmission method.

Unicast is a one-to-one transmission method where data is sent from a single source to a single specific destination address.

Broadcast sends data to all hosts on a network segment or subnet, not selectively to a defined group of receivers.