Question

What is the functionality of a multicast ip address?

Answer 1

A multicast address identifies a group of hosts sharing the same address. Multicast addresses are not assigned to a device, rather, a device proceeds to listen for and receive traffic destined to a multicast group that it has joined by some process. Multicasting is UDP-based.
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Answer 2

multicast data packets within a network

Step-by-step explanation:

A multicast address is a specific type of IP address labeling a network location that is used to multicast data packets within a network.