AWS Certified Cloud Practitioner
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Which of the following is a benefit of running an application across two Availability Zones?
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RRitesh
A
Performance is improved over running in a single Availability Zone.
B
It is more secure than running in a single Availability Zone.
C
It significantly reduces the total cost of ownership versus running in a single Availability Zone.
Explanation:
Explanation
Running an application across two Availability Zones provides high availability and fault tolerance, which is the primary benefit. While option A mentions "performance improvement," the main advantage is actually resilience and disaster recovery.
Key benefits of multi-AZ deployment:
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Fault tolerance: If one Availability Zone fails, the application continues running in another zone
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High availability: Reduces downtime and improves service reliability
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Disaster recovery: Provides geographic redundancy for business continuity
Important clarifications:
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Performance: While there might be some performance benefits due to load distribution, this is not the primary advantage
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Security: Multi-AZ deployment doesn't inherently provide better security than single AZ
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Cost: Running across multiple AZs typically increases costs due to additional infrastructure, not reduces them
The correct understanding is that multi-AZ deployment provides resilience and high availability rather than performance improvements as the main benefit.
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