Final answer:
Amazon SNS has various features including message delivery to both Amazon SQS queues and URLs, as well as offering encryption support. It does not, however, support message recall or guarantee delivery, nor does it sort messages by time automatically.
Step-by-step explanation:
Amazon Simple Notification Service (Amazon SNS) offers a variety of features for managing notifications and messages in a scalable way. Three features of Amazon SNS include:
- Message delivery to an Amazon SQS queue: Amazon SNS can directly send messages to an Amazon SQS queue, allowing for further message handling and processing.
- Message delivery to a URL: Amazon SNS can also send messages to a specified URL, useful for webhooks and other web-based integrations.
- Support for encryption: Amazon SNS provides encryption capabilities to secure messages 'in transit' and 'at rest,' ensuring sensitive information is protected.
It's important to note that Amazon SNS does not support message recall once they have been sent, and while it provides a high level of message durability, it does not explicitly guarantee delivery in all scenarios. Furthermore, automatic message sorting by time is not a built-in feature of Amazon SNS.