Technician A says that the bus topology used in CAN 2.0/ J1939 ensures that no single module networked to the bus has more importance than any other. Technician B says that it is almost impossible to add controllers (SAs) to a J1939 data bus after it has been manufactured. Who is correct?
A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Technician A is correct because in a bus topology, all modules (nodes) are connected to a single communication line equally, ensuring no single module has priority over others. Technician B is incorrect because adding controllers (Source Addresses or SAs) to a J1939 data bus is feasible and common in practice, allowing for system expansion or modification.

Technician a Says That the Bus Topology Used in CAN