Question

a device networked into a system communicates by combining specific internet protocols and a method for connectivity. which of the following are not true? select all that apply. devices today only communicate with networks and the internet using transmission control protocol/internet protocol (tcp/ip). message queuing telemetry transport (mqtt) and constrained application protocol (coap) are two alternative internet protocols that improve iot device operation while maintaining interoperation with the internet. a \constrained\ device is one with limited cpu, memory, and power resources. the devices are often sensors/actuators, smart objects, or smart devices. networked devices are configured in a star pattern using wireless transmission medium only. mqtt and coap are becoming the leading messaging protocols for the iot scenarios.

Explanation:

• Option 1: Devices today use more than just TCP/IP. For example, in IoT, protocols like MQTT and CoAP are also used. So, the statement that devices only communicate using TCP/IP is false.
• Option 2: MQTT and CoAP are indeed alternative Internet protocols that enhance IoT device operation while keeping interoperability with the Internet. This statement is true.
• Option 3: A “constrained” device is defined by limited CPU, memory, and power resources, and often includes sensors/actuators, smart objects, or smart devices. This statement is true.
• Option 4: Networked devices can be configured in various patterns (not just star) and can use both wireless and wired transmission mediums. So, the statement about only using wireless and star pattern is false.
• Option 5: MQTT and CoAP are emerging as leading messaging protocols for IoT scenarios. This statement is true.

Answer:

A. Devices today only communicate with networks and the Internet using Transmission Control Protocol/Internet Protocol (TCP/IP).
D. Networked devices are configured in a star pattern using wireless transmission medium only.