Which system connects sensors and computers with wires and software in a vehicle?

• A. USB
• B. LINbus
• C. CANbus
• D. ETHERNET

Answer: (C)

The main idea is how a vehicle ties together sensors and control units through a single data network that carries messages software can interpret in real time. The system used for this backbone is a two-wire bus that lets many electronic control units (ECUs) and sensors talk to each other reliably. It’s designed for harsh automotive environments, with differential signaling on the two wires to reduce noise, and it supports multiple masters so any node can send messages when it has something to say.

Key features include arbitration by message priority, so higher-priority data (like safety-critical signals) get transmitted first, and robust error detection and handling to keep communication trustworthy even if some wires pick up interference. This makes it ideal for coordinating engine control, braking, airbag systems, and other modules that rely on timely data.

Understanding why the other options aren’t the standard backbone helps clarity. USB is mainly a point-to-point interface for peripherals to a host device, not a vehicle-wide, multi-node network. LINbus is a simpler, single-wire, lower-speed network used for smaller subsystems, not the wide, high-reliability backbone. Ethernet is high-speed and increasingly used for certain vehicle applications, but CAN bus remains the classic, widely adopted backbone for core sensor-to-controller communication across many ECUs.

So, CAN bus is the system that connects sensors and computers with wires and software in a vehicle.