ISC2 Certified Cloud Security Professional (CCSP) Practice Question
An e-commerce company is refactoring its monolithic application into micro-services and moving it to a public cloud IaaS provider. The selected region offers three availability zones, each engineered with independent power, cooling, and network cores. Management requires the application to keep running during both scheduled maintenance and an unexpected failure of any single availability zone, while incurring the lowest additional cost practical. Which deployment strategy best meets these resilience goals?
Distribute the micro-services in an active-active configuration across two different availability zones and use synchronous data replication between them.
Place all workloads in a single availability zone but select instance types covered by the provider's highest uptime SLA.
Deploy the primary environment in one availability zone and take daily snapshots to restore manually in a second zone if a disaster occurs.
Launch duplicate virtual machines in separate subnets within the same availability zone and load-balance traffic between them.
Running the micro-services in an active-active pattern across at least two availability zones eliminates a single point of failure at the zone level and allows one zone to be taken down for maintenance without affecting service. Synchronous replication keeps data consistent, enabling immediate failover with no data loss and minimal interruption. Merely choosing higher-SLA instance types in one zone or placing duplicates in separate subnets within the same zone does not protect against a zone-wide outage. Relying on daily snapshots and manual restoration provides neither the required uptime during maintenance nor the automatic recovery demanded.
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ISC2 Certified Cloud Security Professional (CCSP)
Cloud Platform & Infrastructure Security
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