Producer through lambda:

• no vpc required because aws services can access each other using aws public service network
  • is this automated or do we have to allow this?
• linked through IAM permissions

Consumption through lambda: SQS Event Source Mapping

• relationship between SQS and Lambda
• this would be an automated link between the SQS and the Lambda service hence there is no need for vpc connection
• the lambda service will continually poll the SQS for messages
  • https://docs.aws.amazon.com/lambda/latest/dg/with-sqs.html