Question 44F3

NMEA 2000 is a Controller Area Network (CAN) based serial data bus designed for marine electronics. Its architecture is a simple backbone with devices connected via drop cables. **D) Multiplexers, Combiners, Routers** are NOT standard components of a NMEA 2000 network. NMEA 2000 operates as a peer-to-peer, shared-bus system where all devices directly connect to and communicate on the same bus. Multiplexers, combiners, and routers are typically used in more complex network topologies to manage traffic, combine signals, or route data between distinct networks, which is outside the fundamental NMEA 2000 design. **A) Tees, Drop Cables and terminating Resistors** ARE essential components. Tees connect devices to the backbone, drop cables extend from the tee to the device, and terminating resistors are crucial at each end of the backbone to prevent signal reflections and ensure data integrity. **B) Tees, Backbone Cables, Power Cables** ARE essential. Tees connect devices, backbone cables form the main trunk carrying both data and power, and power cables supply the necessary voltage to the backbone. **C) Termination Resistors, Power Cables, Backbone Cables** ARE essential, for the reasons mentioned above.