What immediately follows the Start Frame Delimiter (SFD) in an ethernet frame?

In an Ethernet frame, the Start Frame Delimiter (SFD) serves as a marker to indicate the beginning of the frame's actual data. The byte immediately following the SFD is the Destination MAC address. It identifies the intended device on the network that the frame is meant for. Each Ethernet frame is structured in a specific way: it starts with a preamble that helps synchronize the network devices, which is then followed by the SFD. After the SFD, the next crucial component is indeed the MAC addresses, starting with the Destination MAC address.

This structure is vital for ensuring that nodes on the network can properly read and act upon the frames they receive, as each MAC address is unique to each networking device. Properly interpreting this data is crucial for efficient and accurate network communication.