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Which statement about Amazon VPC subnets is correct?
AA subnet is bound to a single Availability Zone, and resources in different AZs must live in different subnets
BA subnet automatically spans every Availability Zone in the Region
CA subnet can only host one EC2 instance at a time
DA subnet is a global object shared across all AWS Regions
Answer & Solution
Correct answer: A. A subnet is bound to a single Availability Zone, and resources in different AZs must live in different subnets
Each subnet is scoped to one AZ. To deploy across multiple AZs for high availability you create one subnet per AZ and place resources accordingly. Subnets are Region-local (never global) and hold many instances.
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