Final answer:
B) The problem is likely that the digital lamp is not registered to the home gateway. Proper registration is essential for the home gateway to recognize and allow communication with the IoT device,
Step-by-step explanation:
The correct answer is option b. The digital lamp is not registered to the home gateway. When attempting to control an Internet of Things (IoT) device such as a digital lamp using a tablet or any other smart device, all gadgets must be properly registered with the home gateway, which serves as a hub for communication and control.
If the digital lamp is not showing up on the tablet interface, it's possible that it was never paired or registered with the home gateway, hindering the device's discoverability and control. Registration ensures that the gateway recognizes the device and allows it to communicate with the control interface on the tablet.
While other options like web service being off, connection issues, or incorrect IP configuration could also cause problems, these aren't typically related to the visibility of devices on a control interface. Registration with the gateway is the most fundamental step to ensure that the devices appear on the control interface.