Once you recognize a question as a follow-up, it is okay to elaborate on your answer. By asking a follow-up question, the interviewer has already indicated they need more information on the topic or want to explore it in more depth. This provides you with permission to expand your answer and include details not provided during your initial response. However, try not to embellish too much or provide content for the sake of content. Interviewers always appreciate brevity and directness.

"The main differences between LIN and CAN protocols are their costs, capabilities, and applications. The LIN protocol provides vehicles with a low-cost, short-distance, and low-speed network. LIN operates within a CAN environment but doesn't require the high data rate and wider bandwidth or the higher cost of CAN. Working together, these protocols enable developers to create automotive systems that are both effective and efficient."