Final answer:
Broadcasting refers to sending a message to all devices on a network, while multicasting involves sending a message to a specific group of devices.
Step-by-step explanation:
Broadcasting and multicast are two concepts related to data transmission in computer networks.
Broadcasting refers to sending a message to all devices on a network. In this method, a single packet is sent, and all devices receive and process the message, regardless of whether they are the intended recipients or not. An example of broadcasting is when a computer sends out a request for an IP address by sending a message to all devices on the network.
Multicasting is a more efficient way of sending messages to multiple devices. In multicast, a single packet is sent, but only devices that are part of a specific group receive and process the message. Devices that are not part of the group do not process the message. An example of multicasting is a video streaming service where multiple users watch the same video stream.