IoT Applications

Correct Answer: Temperature and humidity sensors

Temperature and humidity sensors are the correct choice for monitoring indoor temperature and humidity, as they are specifically designed for this purpose. The other sensors listed are not appropriate for measuring temperature and humidity.

Correct Answer: Implement a local cache and Edge computing

Implementing a local cache and Edge computing is the best solution to address frequent disconnections from the cloud server in an IoT-enabled vending machine. A local cache allows the machine to store data and continue functioning even when the connection to the cloud is lost. Edge computing enables the machine to process data locally, reducing its dependence on the cloud server. Increasing network bandwidth may help, but it does not solve the issue of intermittent connectivity. Replacing the machine with a non-IoT device would defeat the purpose of having an IoT-enabled vending machine. Encrypting the connection is important for security but does not directly address the problem of frequent disconnections.

Correct Answer: Implement a Quality of Service (QoS) policy on the network

Implementing a Quality of Service (QoS) policy on the network is the best solution to improve data transmission for the IoT devices used in the hospital for remote patient monitoring. QoS allows prioritizing critical traffic, such as the vital sign data from the sensors, over less important traffic. This ensures that the important data gets transmitted quickly and reliably, even during network congestion. Replacing the Wi-Fi router with a more powerful one may help, but it does not address the fundamental issue of prioritizing the critical data. Restricting personal devices from accessing the network can free up bandwidth, but it still doesn't guarantee priority for the vital sign data. Switching to a cellular network is not necessary and may introduce additional costs and complexity.