Microsoft Azure Solutions Architect Expert AZ-305 Practice Question
Contoso runs four critical line-of-business virtual machines on a pair of on-premises VMware ESXi hosts. Management wants a cloud-based disaster-recovery solution that meets these requirements: recover VMs in Azure with an RPO of no more than 15 minutes and an RTO under two hours, perform non-disruptive failover tests, and keep ongoing costs as low as possible until a failover occurs. Which Azure service should you recommend?
Implement SQL Server Always On Availability Groups between the on-premises hosts and Azure virtual machines over a VPN connection.
Use Azure Backup to create daily backups of the virtual machines to an Azure Recovery Services vault.
Deploy Microsoft Azure Backup Server on-premises and enable replication of the VMs to Azure Blob Storage.
Configure Azure Site Recovery to replicate the VMware virtual machines to an Azure region and orchestrate failover by using recovery plans.
Azure Site Recovery (ASR) is purpose-built for disaster recovery of on-premises VMware, Hyper-V, physical servers, and Azure VMs. For VMware to Azure scenarios it offers near-continuous replication with target RPOs as low as five minutes and orchestrated recovery plans that support test failovers without affecting production workloads. With ASR, you pay mainly for storage and replication licensing; compute charges start only when VMs are brought online during testing or an actual failover, aligning with the cost constraint.
Azure Backup and Microsoft Azure Backup Server provide point-in-time backups on an hourly or daily schedule and cannot guarantee a 15-minute RPO or automated VM-level failover orchestration. SQL Server Always On Availability Groups protect only the SQL data layer, not the entire virtual machines, and require additional licensing and infrastructure while lacking integrated DR testing workflows. Consequently, ASR is the only option that satisfies all recovery objectives and operational requirements.
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Microsoft Azure Solutions Architect Expert AZ-305
Design business continuity solutions
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