NMEA 2000 network connections are made via which components to connect devices to the backbone?

• A. RJ45 plugs
• B. Soldered joints
• C. T's and drops
• D. Crimp connectors only

Answer: (C)

In an NMEA 2000 network, devices connect to the backbone by using a trunk (backbone) with T-branch connectors and short drop cables. The T-connector branches off the main backbone, and a drop cable runs from that branch to each individual device, giving the device access to the CAN bus. This arrangement is what allows multiple devices to share the same network while remaining modular and serviceable in a marine environment. RJ45 plugs belong to Ethernet, not NMEA 2000, so they aren’t used for backbone connections. Soldered joints aren’t standard practice for NMEA 2000 aboard ships or boats because they’re less reliable under vibration and exposure; field-ready networks rely on the molded, standardized T-connectors and drop cables. Crimp connectors are part of the construction, but you can’t rely on crimps alone—the network must include the T-branch pieces to connect devices to the backbone.