What does the header of an Ethernet frame consist of, in order?

The correct answer outlines the specific components that make up the header of an Ethernet frame in the precise order they appear.

The header begins with the preamble, which is used for synchronization between sender and receiver, allowing the receiving device to recognize that a frame is being sent. Following the preamble is the Start Frame Delimiter, a specific byte that indicates the start of the frame's actual data section.

Next is the Destination MAC address, which identifies the intended recipient of the frame. This is crucial for ensuring that the data is sent to the correct device on the network. After the destination address is the Source MAC address, which indicates the sender of the frame. This allows the receiving device to know where the frame originated. Finally, the Type field follows the source address; it indicates the type of protocol being used in the frame's payload, allowing the receiving device to process the encapsulated data correctly.

Together, these components are essential for the effective delivery of frames in an Ethernet network, ensuring that data is transmitted accurately and efficiently to the correct device.