Microsoft Azure Solutions Architect Expert AZ-305 Practice Question
Contoso runs two Windows Server virtual machines (VMs) in the Azure East US region and a business-critical SQL Server VM on a VMware host in its on-premises datacenter. The company has set these disaster-recovery objectives:
If East US becomes unavailable, the Azure VMs must start in West US with a recovery point objective (RPO) of no more than 15 minutes and a recovery time objective (RTO) of no more than 2 hours.
The on-premises SQL Server VM must be able to fail over to Azure within the same RPO and RTO targets.
Administrators must be able to perform failover tests at any time without disrupting production workloads.
You need to recommend a single Azure service or capability that meets all these requirements. Which option should you choose?
Azure Site Recovery replication for both Azure VMs and on-premises VMware VMs
Read-access geo-redundant storage (RA-GRS) snapshots of the virtual disks
Availability Sets for the Azure VMs combined with Azure Traffic Manager failover profiles
Azure Backup using a Recovery Services vault configured with geo-redundant storage
Azure Site Recovery (ASR) provides near-continuous replication of Azure IaaS VMs to a secondary region and of on-premises VMware (or physical) servers to Azure. It can achieve RPOs measured in seconds to minutes and is covered by a Microsoft SLA that guarantees recovery of failed-over Azure VMs within two hours, satisfying the 2-hour RTO target. ASR also offers a built-in, non-disruptive test-failover feature that lets administrators validate disaster-recovery plans without affecting production. Services such as Azure Backup, Availability Sets with Traffic Manager, or RA-GRS snapshots do not provide continuous replication of running VMs with the required RPO/RTO or the ability to orchestrate test failovers, so they fail to meet the full set of objectives.
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Microsoft Azure Solutions Architect Expert AZ-305
Design business continuity solutions
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