Final answer:
Ethernet uses Carrier Sense Multiple Access with Collision Detection (CSMA/CD) on legacy hubs, where devices listen before transmitting and detect and handle collisions by waiting a random time before retransmitting.
Step-by-step explanation:
The data link layer media access control method that Ethernet uses with legacy Ethernet hubs is called Carrier Sense Multiple Access with Collision Detection (CSMA/CD). This method allows multiple devices on the same network to access the medium (Ethernet) by listening to ensure no other device is transmitting (carrier sense). If the medium is free, a device can transmit. However, if two devices transmit simultaneously, this causes a collision. After detecting the collision, each device waits a random amount of time before attempting to retransmit, minimizing the chances of another collision.