Elasticity, scalability, availability, fault tolerance, and global reach

By the end you’ll be able to

• Differentiate elasticity from scalability using AWS-aligned examples, including automatic resource adjustment for changing demand versus planned growth in capacity.
• Explain vertical scaling and horizontal scaling and identify when each approach is being described in a scenario.
• Describe availability as the ability of a workload to remain operational and accessible, and relate it to AWS infrastructure design across multiple Availability Zones.