- A
Deploy Azure Cache for Redis Enterprise with active geo-replication.
Active geo-replication for Redis Enterprise supports multi-region writes and automatic failover for cache data.
- B
Deploy Azure Front Door with origin groups for the AKS clusters.
Azure Front Door provides automatic failover and load balancing across AKS clusters in multiple regions.
- C
Use Azure Traffic Manager to route traffic to the primary region.
Why wrong: Azure Front Door provides better integration with AKS and Cosmos DB; Traffic Manager is DNS-based and less suited for AKS.
- D
Configure Azure Cosmos DB with multiple write regions.
Multi-region writes enable zero data loss during failover as writes are accepted in any region.
- E
Use Azure SQL Database with failover groups for the database tier.
Why wrong: Azure SQL Database failover groups do not support multi-region writes; they are active-passive.
AZ-305 Design business continuity solutions Practice Question
This AZ-305 practice question tests your understanding of design business continuity solutions. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
You are designing a business continuity solution for a global SaaS application that runs on Azure Kubernetes Service (AKS) with Azure Cosmos DB as the database. The solution must support multi-region writes and automatic failover with zero data loss. Which THREE components should you include in your design? (Choose three.)
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
Deploy Azure Cache for Redis Enterprise with active geo-replication.
Option A, Option C, and Option D are correct. Azure Cosmos DB with multi-region writes supports zero data loss during failover. Azure Front Door provides global load balancing and automatic failover for the AKS clusters. Azure Cache for Redis Enterprise with active geo-replication provides low-latency cache with multi-region writes. Option B is wrong because Azure Traffic Manager is not required when using Front Door. Option E is wrong because Azure SQL Database does not support multi-region writes natively like Cosmos DB.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Deploy Azure Cache for Redis Enterprise with active geo-replication.
Why this is correct
Active geo-replication for Redis Enterprise supports multi-region writes and automatic failover for cache data.
Related concept
Static NAT maps one inside address to one outside address.
- ✓
Deploy Azure Front Door with origin groups for the AKS clusters.
Why this is correct
Azure Front Door provides automatic failover and load balancing across AKS clusters in multiple regions.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
Use Azure Traffic Manager to route traffic to the primary region.
Why it's wrong here
Azure Front Door provides better integration with AKS and Cosmos DB; Traffic Manager is DNS-based and less suited for AKS.
- ✓
Configure Azure Cosmos DB with multiple write regions.
Why this is correct
Multi-region writes enable zero data loss during failover as writes are accepted in any region.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
Use Azure SQL Database with failover groups for the database tier.
Why it's wrong here
Azure SQL Database failover groups do not support multi-region writes; they are active-passive.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related AZ-305 NAT questions on configuration and troubleshooting.
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Design business continuity solutions — study guide chapter
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FAQ
Questions learners often ask
What does this AZ-305 question test?
Design business continuity solutions — This question tests Design business continuity solutions — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Deploy Azure Cache for Redis Enterprise with active geo-replication. — Option A, Option C, and Option D are correct. Azure Cosmos DB with multi-region writes supports zero data loss during failover. Azure Front Door provides global load balancing and automatic failover for the AKS clusters. Azure Cache for Redis Enterprise with active geo-replication provides low-latency cache with multi-region writes. Option B is wrong because Azure Traffic Manager is not required when using Front Door. Option E is wrong because Azure SQL Database does not support multi-region writes natively like Cosmos DB.
What should I do if I get this AZ-305 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related AZ-305 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 20, 2026
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.
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