What is the multicast group address for all devices on a network?

The multicast group address for all devices on a network is represented by the address allocated for all nodes. In IPv4, this address is 224.0.0.0, which is designated for special use as it allows one-to-many communication, enabling a single sender to transmit data to multiple receivers simultaneously. This makes it highly efficient for applications like streaming or broadcasting, where the same data needs to reach multiple devices without sending separate copies for each recipient.

Choosing this option reflects an understanding of how multicast addressing works in a networking context. It effectively demonstrates the concept of a multicast group, where messages are sent to a specific group of interested devices rather than to individual machines or all routers specifically. This distinction is crucial in network communication for managing bandwidth and ensuring data efficiency.