. . . . . . . . layer is the communication layer that connects the IoT devices with WAN.

internet layer
application layer
sensor layer
network layer

The correct answer is: D. network layer

The network layer is the communication layer that connects the IoT devices with WAN. It is responsible for routing data packets between different networks. The network layer is the third layer of the Open Systems Interconnection (OSI) model.

The other options are incorrect because:

  • The internet layer is responsible for routing data packets between different networks. However, it does not connect IoT devices with WAN.
  • The application layer is responsible for providing services to applications. It does not connect IoT devices with WAN.
  • The sensor layer is responsible for collecting data from sensors. It does not connect IoT devices with WAN.