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Question 1 of 10
A customer has a web application that uses cookie-based sessions to track logged-in users. It is deployed on AWS using Elastic Load Balancing and Auto Scaling. When load increases, Auto Scaling launches new instances, but the load on the other instances does not decrease; this causes all existing users to have a slow experience. What could be the cause of the poor user experience?
AELB DNS record’s TTL is set too high.
BThe new instances are not being added to the ELB during the Auto Scaling cooldown period.
CThe website uses the dynamic content feature of Amazon CloudFront which is keeping connections alive to the ELB.
DELB is continuing to send requests with previously established sessions to the same backend instances rather than spreading them out to the new instances.