Question 670
A company places two redundant application servers in one Availability Zone and calls that zone fault tolerance. Which underlying reason BEST explains the recommended choice?
Explanation
Correct Answer
Multiple machines inside one AZ can still share the same zone failure domain. This principle explains why the suitable decision is: Use more than one AZ when the business requires protection from an AZ outage. The confirming observation would be: A simulated AZ outage leaves at least one healthy instance in another AZ. A useful continuing practice is: Inventory shared storage and networking dependencies by AZ.
Incorrect Answers
Edge locations provide selected network and caching functions rather than every regional service. In this question, however, multiple machines inside one AZ can still share the same zone failure domain. The answer that meets the requirement is: Multiple machines inside one AZ can still share the same zone failure domain.
Edge caches can serve eligible content near viewers while origins remain elsewhere. In this question, however, multiple machines inside one AZ can still share the same zone failure domain. The answer that meets the requirement is: Multiple machines inside one AZ can still share the same zone failure domain.
Regions are distinct geographic locations and matter for data location and supported services. In this question, however, multiple machines inside one AZ can still share the same zone failure domain. The answer that meets the requirement is: Multiple machines inside one AZ can still share the same zone failure domain.