Network Defense Essentials (NDE) Practice Exam

The device tier is the component of an IoT-enabled IT environment responsible for directly interacting with physical phenomena, such as detecting smoke. Devices within this tier, like smoke detectors, are equipped with sensors that can monitor their surroundings. When smoke is detected, these devices can process the information locally and trigger an alert. This capability is crucial for immediate safety responses, enabling rapid action in emergency situations by sending alerts to the relevant parties, such as building occupants or emergency services. In contrast, the other tiers serve different functions. The gateway tier typically manages communication between the device tier and external networks, but it does not handle detection tasks directly. The cloud tier usually provides storage, analytics, and processing power but does not interact with physical events directly. Lastly, the network tier facilitates data transmission among various components and does not detect environmental changes. Each of these other tiers plays a supporting role, while the device tier is specifically designed to sense and respond to smoke detection.