ISC2 Certified Cloud Security Professional (CCSP) Practice Question
An e-commerce firm runs its application in a single public cloud region. Management mandates a disaster recovery solution that can resume service within 2 hours after a regional outage and lose at most 15 minutes of data, but budget constraints rule out a fully active-active deployment. Which cloud DR pattern best satisfies these RTO and RPO targets while controlling cost?
Active-active multi-site deployment with global load balancing
Warm standby environment with scaled-down but running duplicate infrastructure
Pilot light architecture with continuous data replication and scripted instance provisioning
Backup-and-restore using daily snapshots stored in object storage
A pilot light strategy keeps a minimal copy of the production environment (core databases and critical services) continuously replicated in a secondary region. Because only essential components are running, operating costs stay low. When a disaster occurs, additional application servers can be started from pre-created images and the data store is promoted, allowing service restoration in tens of minutes-well within the 2-hour RTO-and with data loss limited to the replication window of a few minutes, meeting the 15-minute RPO. Backup-and-restore usually exceeds both the RTO and RPO because large volumes must be restored. Warm standby keeps a scaled-down but fully functional environment continuously running, offering faster recovery but at higher ongoing cost than necessary. An active-active multi-site setup delivers near-zero RTO/RPO but is the most expensive option and was explicitly ruled out.
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ISC2 Certified Cloud Security Professional (CCSP)
Cloud Concepts, Architecture and Design
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