Questions
Let's review the chapter by answering the following questions:
- Which protocol makes use of topics to publish and subscribe?
a) HTTP
b) WebSocket
c) CoAP
d) MQTT
- Which one is not correct for CoAP?
a) It is a server-client protocol.
b) It provides RESTful communication for IoT devices.
c) Only runs on top of UDP.
d) A client sends HTTP requests.
- Which problem is solved by WebSocket?
a) Polling server for status updates
b) The need for a server
c) Lowers the energy consumption of constrained devices
d) Replaces TCP for IoT devices
- Which one is not a common feature of IoT platforms?
a) They provide secure endpoints.
b) Security is an optional feature.
c) We can use more services after authenticating an IoT device.
d) Data analytics in the cloud.
- What is not correct about an MQTT connection to AWS IoT?
a) A policy file is needed to define permissions.
b) A device must be authenticated to communicate.
c) A policy file is automatically generated when a thing is created...
