A message intended to reach all devices on the same local network is called:

A message intended to reach all devices on the same local network is called:

• A. Unicast message
• B. Broadcast message
• C. Multicast message
• D. Anycast message

Answer: (B)

A message intended for all devices on the same local network is broadcast. In broadcasting, the sender uses a special address so every host on that subnet receives and can process the packet. This is different from unicast, which goes to a single device; from multicast, which targets a specific group of devices that subscribe to a multicast group; and from anycast, which is delivered to the nearest member of a group. Because broadcasts are meant for everyone on the local network, routers typically don’t forward them to other networks, keeping the delivery scope local. In IPv4 you commonly see a dedicated broadcast address like 255.255.255.255 or the subnet’s broadcast address (for example, 192.168.1.255). In IPv6 there isn’t a traditional broadcast mechanism, and similar reach is achieved with multicast.

A message intended for all devices on the same local network is broadcast. In broadcasting, the sender uses a special address so every host on that subnet receives and can process the packet. This is different from unicast, which goes to a single device; from multicast, which targets a specific group of devices that subscribe to a multicast group; and from anycast, which is delivered to the nearest member of a group. Because broadcasts are meant for everyone on the local network, routers typically don’t forward them to other networks, keeping the delivery scope local. In IPv4 you commonly see a dedicated broadcast address like 255.255.255.255 or the subnet’s broadcast address (for example, 192.168.1.255). In IPv6 there isn’t a traditional broadcast mechanism, and similar reach is achieved with multicast.