AZ-305 Design business continuity solutions Practice Question
A company runs a critical web application on Azure VMs in the West US region. They need a disaster recovery solution that replicates the VMs to the East US region. The recovery point objective (RPO) must be 30 minutes, and the recovery time objective (RTO) must be 1 hour. The company also needs to perform quarterly disaster recovery drills without impacting the production environment. Additionally, after a failover, the solution must automatically update traffic management to route users to the East US region. Which combination of Azure services should they use?
⚠ Common exam trap
A common trap is to choose Azure Front Door because of its global routing capabilities, but Azure Traffic Manager is the correct fit here. Traffic Manager integrates natively with Azure Site Recovery recovery plans, enabling automatic DNS updates after failover. While Front Door can route based on health probes, it does not integrate directly with ASR recovery plans, requiring custom automation to update backend pools post-failover.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure Site Recovery and Azure Traffic Manager
Azure Site Recovery (ASR) orchestrates replication, failover, and failback of Azure VMs from West US to East US, meeting the 30-minute RPO and 1-hour RTO. Azure Traffic Manager automatically updates DNS-based traffic routing to the East US region after failover, ensuring users are redirected without manual intervention. This combination satisfies all requirements: DR replication, RPO/RTO, quarterly drills (via test failover), and automated traffic management.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Azure Site Recovery and Azure Traffic Manager
Why this is correct
Azure Site Recovery handles VM replication with the required RPO/RTO and supports non-disruptive test failovers. Azure Traffic Manager can automatically route user traffic to the secondary region after failover by using endpoint monitoring and failover priority.
- ✗
Azure Backup and Azure Traffic Manager
Why it's wrong here
Azure Backup provides backup and restore but does not meet the RPO/RTO for replication and does not support automated failover or test failovers.
- ✗
Azure Site Recovery and Azure Front Door
Why it's wrong here
Azure Front Door, while a global traffic management service, is primarily designed for optimising performance, caching, and WAF capabilities for web applications. It can route traffic and perform automatic failover between backend pools, but it doesn't integrate directly with Azure Site Recovery's failover process to automatically update DNS records or endpoint configurations in the same way Azure Traffic Manager does for a full regional disaster recovery event. This combination is tempting because Azure Front Door offers global routing and automatic failover for web applications, making it suitable for active-active deployments or performance-based routing scenarios.
- ✗
Azure Backup and Azure Front Door
Why it's wrong here
Azure Backup does not provide the required replication capabilities, and Azure Front Door alone cannot replicate VMs.
Go deeper
Related to this question
Learn chapter
Designing Application Architecture
Key term
Disaster Recovery Design
Disaster Recovery Design is the process of planning and implementing strategies to restore IT systems and data after a catastrophic failure, ensuring business continuity with minimal downtime and data loss.
Key term
BIA and RPO RTO Design
Business Impact Analysis and the design of Recovery Point Objective and Recovery Time Objective define how much data loss and downtime a business can tolerate after an IT failure, guiding the architecture of backup and disaster recovery systems.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This AZ-305 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-305 exam.