How does Multicast differ from Broadcast?

1. A Broadcast transmits data to every single active device on the local subnet; Multicast transmits data only to a specific 'Interest Group' that has proactively joined the stream.
2. B Broadcast is mathematically optimized for high-speed fiber-optic data transfer, while Multicast is limited to older copper-based Ethernet and wireless networking technologies.
3. C Multicast is a specialized protocol designed strictly for residential 41-bit video streaming, while Broadcast is used for sending human-readable text-based logs across a data center.
4. D Multicast is capable of routing data across the global public internet, while Broadcast is strictly confined to the local area network (LAN) and cannot cross a standard router boundary.