Summary

• AWS SNS works based on push technology.
• An SNS topic acts as an access point between the publisher and subscriber applications.
• When several Amazon SQSs act as a subscriber, a publisher sends a message to an SNS topic and it distributes this topic to many SQS queues in parallel. This concept is called fanout.
• SNS can send mobile push notifications directly to mobile applications.
• SNS can push email and text messages to subscriber applications or users.
• Each SNS topic can have multiple subscribers.
• Each subscriber may use the same, or different, protocols.
• Subscribers can receive a notification over a desired protocol as and when the publisher sends any message to the same topic.
• SNS provides various protocols for communication (HTTP, HTTPS, email, email-JSON, Amazon SQS, application, AWS Lambda, or SMS).
• As soon as the publisher sends a message to an SNS topic, it tries...