What is the broadcast MAC address that is used in networking?

The broadcast MAC address used in networking is FF:FF:FF:FF:FF:FF. This address is significant because it is utilized to send frames to all devices on a local network segment. When a frame is sent to this address, every Ethernet device on that local network receives the frame and processes it, regardless of its own unique MAC address.

This is especially important in scenarios like ARP (Address Resolution Protocol) where a device needs to discover the MAC address associated with a given IP address, as it performs a broadcast to all other devices to request this information. The use of this specific MAC address allows for effective communication across a broadcast domain by ensuring that every compatible device receives the transmitted messages. Other addresses provided in the options do not serve this universal broadcast function, as they are either unassigned or specific to certain protocol operations.