SNS Protocol Support

5 minutes 5 Questions

AWS SNS supports various communication protocols for message delivery, enabling applications to communicate and process messages efficiently. The supported protocols include Amazon Simple Queue Service (SQS), AWS Lambda, SMS, Email/Email-JSON, Application (for mobile push notifications), and HTTP/HTTPS. With this diverse set of protocol support, AWS SNS allows developers to create flexible and modular systems capable of integrating different services, processing messages in various ways, and reaching a wide range of devices or endpoints. The choice of protocol depends on the requirements of the specific application and the desired reliability, speed, and format of message delivery.

Guide on AWS SNS Protocol Support

What is AWS SNS Protocol Support:
AWS SNS (Simple Notification Service) is a flexible, fully managed publish-subscribe messaging service that sends messages from applications to subscribing endpoints. It supports several protocols such as HTTP/S, Email, Email-JSON, SQS, Application, Lambda, and SMS protocol.
Why AWS SNS Protocol Support is Important:
This variety of protocol support extends the flexibility and reach of notifications to a great extent ranging from serverless applications to text messages. This ensures reliable messaging with added features such as throttling, retries and deduplication.
How AWS SNS Protocol Support Works:
After a publisher sends a message to the SNS topic, Amazon SNS forwards the message to all the available subscribing endpoints based on the protocol defined for them.
Exam Tips - Answering Questions on AWS SNS Protocol Support:
1. Understand the different protocols and when to use them.
2. Know the benefits of SNS protocol support i.e. efficient communication, diversity in message delivery options, and loyalty.
3. Review the working of SNS topic as one message can be delivered to multiple end-points (subscribers).
4. Extra focus should be on the 'fanout pattern' as it is commonly used with SNS.
5. Keep in mind that message delivery depends on subscribing end-points protocol.

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Question 1

You are building a weather application that analyzes data from multiple sources and sends alerts via email to subscribers. Which protocol should you use for SNS message delivery?

Email Email-JSON HTTP SMS

Correct Answer: Email-JSON

Email-JSON protocol should be used for structured-email notifications. It sends emails in JSON format which allows more control over the content of the email, while the 'Email' protocol sends plain text emails, and the other options do not support email message delivery.

Question 2

Your Company is developing a gaming app that requires players to be notified through push notifications when a new level is unlocked. What is the best approach to deliver notifications to mobile devices using SNS?

Launch an EC2 Instance that listens for notifications, and then sends them via SES emails. Create an SNS topic, add SMS subscriptions for mobile devices, and publish messages to the topic. Create an S3 bucket, store notifications JSON in the bucket, and fetch notifications directly from the devices. Create an SNS topic, add platform application subscriptions for mobile devices, and publish messages to the topic.

Correct Answer: Create an SNS topic, add platform application subscriptions for mobile devices, and publish messages to the topic.

Creating an SNS topic with platform application subscriptions enables push notifications to be easily sent to mobile devices. Other options require either additional processes or are not suitable for push notifications.

Question 3

You have a fleet of IoT devices that need to send notifications when certain events occur. You need to send these notifications to mobile devices such as phones and tablets via SMS. What is the best way to achieve this using SNS?

Create an SNS platform application for each mobile device, and let IoT devices send notifications directly to connected devices. Create an SNS topic, add SMS subscriptions for the devices, and have IoT devices publish messages to the topic. Create an S3 bucket, store IoT data in the bucket, and have mobile devices read directly from the bucket. Create a single AWS Lambda function which receives data from IoT devices, processes it, and sends it via SNS SMS.

Correct Answer: Create an SNS topic, add SMS subscriptions for the devices, and have IoT devices publish messages to the topic.

Creating an SNS topic and adding SMS subscriptions allows IoT devices to easily send messages to a topic which will then send notifications via SMS. The other options are not suitable because they either require more involved processes or wouldn't scale well for a large number of devices.

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