Services

Question 1

What is Kinesis Data Streams?

Answer 1

A scalable and durable real-time data streaming service. It can handle gigabytes of data per second from various sources, including financial transactions, social media feeds, logs, website clickstreams, database event streams, and location-tracking events.

Question 2

What is IoT Device Gateway?

Answer 2

• Serves as the entry point for IoT devices connecting to AWS
• Supports the MQTT, WebSockets, and HTTP 1.1 protocols
• Fully managed and scales automatically to support over a billion devices

Question 3

What is the IoT Message Broker?

Answer 3

• Pub/sub (publishers/subscribers) messaging pattern - low latency
• Devices can communicate with one another this way
• Messages sent using the MQTT, WebSockets, or HTTP 1.1
protocols
• Messages are published into topics (just like SNS)
• Message Broker forwards messages to all clients connected to
the topic

Question 4

What is the Iot Thing Registry?

Answer 4

*** Similar to IAM but now for IoT
• All connected IoT devices are represented in the AWS IoT registry
• Organizes the resources associated with each device in the AWS Cloud
• Each device gets a unique ID
• Supports metadata for each device (ex: Celsius vs Fahrenheit, etc…)
• Can create X.509 certificate to help IoT devices connect to AWS
• IoT Groups: group devices together and apply permissions to the group

Question 5

What is IoT Device Shadow?

Answer 5

It is an online mirror of the status of your device:
• JSON document representing the state of a connected Thing
• We can set the state to a different desired state (ex: light on)
• The IoT thing will retrieve the state when online and adapt

Question 6

What is IoT Rules Engine?

Answer 6

• Rules are defined on the MQTT topics
• Rules = when it’s triggered /// Action = what is does
• Rules use cases:
  
  • Augment or filter data received from a device
  • Write data received from a device to a DynamoDB database
  • Save a file to S3
  • …
• Rules need IAM Roles to perform their actions

Question 7

How can we send data from IoT Devices to Kinesis Streams or Kinesis Firehose?

Answer 7

Send it to an IoT topic and define an IoT Rule Action to send data all the way to Kinesis

Question 8

What is IoT Greengrass?

Answer 8

• IoT Greengrass brings the compute layer to the device directly
• You can execute AWS Lambda functions on the devices

Question 9

What is OpsHub?

Answer 9

• Historically, to use Snow Family devices, you needed a CLI (Command Line Interface tool)
• Today, you can use AWS OpsHub (a software you install on your computer / laptop) to manage your Snow Family Device