When is this MAC address used?: ff:ff:ff:ff:ff:ff

Difficulty: unrated

Source: bregman-arie/devops-exercises by Arie Bregman

Answer

When a device sends a packet to the broadcast MAC address (FF:FF:FF:FF:FF:FF), it is delivered to all stations on the local network. Ethernet broadcasts are used to resolve IP addresses to MAC addresses (by ARP) at the data link layer.