A public portal sees weekday peaks and overnight quiet periods. Which mechanism adjusts EC2 capacity as load changes?
Select an answer to reveal the explanation.
Short Explanation
Busy mornings, sleepy nights—Auto Scaling adds and removes EC2 capacity so the portal flexes with load. That is elasticity in plain terms. Shield, SMS-only alarms, and Config are valuable tools, but they are not the capacity scaler.
Full Explanation
Amazon EC2 Auto Scaling automatically increases or decreases the number of instances based on demand or schedules, delivering elasticity for variable civic traffic. It is a foundational compute concept on the Cloud Practitioner exam. Security, notification, and configuration-compliance services play different roles and do not replace Auto Scaling groups. Matching capacity to load improves availability and cost efficiency for public portals.