Sticky sessions ensure that all requests from a particular client are sent to the same EC2 instance. While this can be useful for maintaining session state, it doesn't protect against data loss if an instance fails. If the instance holding a client's session fails, that session data would be lost.
C is Correct: Use Amazon DynamoDB to perform scalable session handling.
If an EC2 instance fails, the session data stored in DynamoDB remains intact and can be accessed by other instances.
A : Sticky sessions — also known as session persistence — is the method that makes it possible for the load balancer to identify requests coming from the same client and to always send those requests to the same server.
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