Which three basic parts are common to all frame types supported by the data link layer?

The correct answer highlights the fundamental structure of frames used within the data link layer of the OSI model. Each frame, regardless of the specific protocol or technology in use, is comprised of three basic components: the header, the data, and the trailer.

The header contains essential information necessary for frame processing, such as source and destination addresses, as well as control information. This is critical for the proper interpretation of the data as it travels through the network.

The data portion carries the actual payload, which is the information being transmitted. This can be anything from user data to control information that needs to be communicated between devices.

Lastly, the trailer serves several purposes, including error checking through mechanisms like the Frame Check Sequence (FCS). This helps to ensure the integrity of the data being transmitted, allowing the receiving device to verify that the frame has not been corrupted during transit.

Understanding this structure is fundamental for grasping how data link layer protocols operate and ensure reliable communication over network connections.