Your question is CAN Bus Fundamentals. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
What do you know about the CAN bus?
Explain how Classical CAN works at the physical and frame levels, including arbitration, identifiers, broadcast communication, termination, and error handling. Discuss its security limitations and how you would protect an automotive CAN network against spoofing, message tampering, replay, denial of service, and unauthorized diagnostic access. Include at least one method for testing or monitoring those protections.