Final answer:
The statement is true; multiplexing is the method by which multiple signals or data streams from different computers in a vehicle's network are combined and sent over a shared communication medium.
Step-by-step explanation:
The interaction between the different computers in a vehicle's computer network is indeed referred to as multiplexing. Multiplexing is a method used to combine multiple signals or data streams into one, to be sent over a shared medium, and can be applied in automotive computer networks. In such networks, numerous electronic control units (ECUs) communicate with each other through a shared communication bus. Using multiplexing, these ECUs can transmit and receive multiple signals over the network without the need for a separate physical connection for each signal, considerably reducing the complexity and the amount of wiring required within the vehicle.