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.

Group of answer choices

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.

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.

Answer 1

Although MQTT and CoAP are gaining popularity in IoT, it's not true that networked devices use only wireless media in a star pattern, or that devices communicate only via TCP/IP.

Therefore, the options which are not true are:

- Networked devices are configured in a star pattern using wireless transmission medium only.

- Devices today only communicate with networks and the Internet using Transmission Control Protocol/Internet Protocol (TCP/IP).

Step-by-step explanation:

The statements provided contain several considerations relating to how devices within networks communicate.

First, it is not true that networked devices are configured in a star pattern using wireless transmission medium only. Various network topologies and transmission media can be used.

Secondly, MQTT and CoAP are indeed gaining traction as leading messaging protocols in Internet of Things (IoT) applications due to their simplicity and efficiency in constrained environments.

Thirdly, the claim that devices today communicate with networks and the Internet using only TCP/IP is incorrect. While TCP/IP is fundamental, other protocols like MQTT, CoAP, and UDP can also be used for special purposes like IoT scenarios.

Furthermore, MQTT and CoAP indeed are alternative Internet protocols that improve IoT device operation and maintain compatibility with the broader Internet.

The description of a “constrained” device is accurate; these are devices with limited resources, often embedded within IoT systems.