High availability, fault tolerance, scalability and elasticity sound similar, and the exam deliberately uses them as distractors for each other. Learning a precise definition and the AWS feature behind each one earns easy points. Before starting, recall the building blocks: an AWS Region is a geographic area, and each Region contains multiple Availability Zones (AZs), which are one or more discrete data centers with independent power, cooling and networking, connected to each other with low-latency links.
Free account
Keep reading for free
Create a free StudyToCert account to read the rest of this lesson: 7 more sections, 7 key terms, a real-world example, an exam tip and self-check questions. Every lesson, lab and practice test is free with an account.