The correct configuration is object replication with a minimum RPO of 15 minutes and read-access in the secondary region. This meets the compliance requirement because object replication allows you to set a specific replication time objective (RPO) of 15 minutes, ensuring data updates are asynchronously copied to a secondary region within that window, while enabling read-access in the secondary region satisfies the recovery time objective (RTO) of 1 hour by allowing immediate reads from the replica without waiting for a manual failover. On the AZ-305 exam, this scenario tests your ability to distinguish between Azure’s built-in geo-redundant options (like RA-GRS or GZRS) and the more granular control offered by object replication, with a common trap being that RA-GRS has a 15-minute RPO but requires a manual failover that can exceed the RTO. Remember: object replication gives you a configurable RPO and instant secondary reads, while geo-redundant storage options lock you into a fixed RPO and manual failover—think “object for control, geo for simplicity.”
AZ-305 Design business continuity solutions Practice Question
This AZ-305 practice question tests your understanding of design business continuity solutions. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
A healthcare organization stores patient records in Azure Blob Storage with a hot access tier in the East US region. The compliance policy requires that data be recoverable within 1 hour in the event of a regional disaster. The data is updated every 10 minutes and must be recoverable to a consistent state within 15 minutes of failure. Which configuration should you implement?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use object replication with a minimum RPO of 15 minutes and configure read-access in the secondary region
Option D is correct because object replication with a minimum Replication Time Objective (RTO) of 15 minutes meets the RPO requirement, and a secondary read-access region meets the RTO of 1 hour. Option A is wrong because RA-GRS has an RPO of 15 minutes but failover is manual and may take longer. Option B is wrong because GZRS with manual failover may exceed RTO. Option C is wrong because geo-redundant storage (GRS) does not provide read access in the secondary region.
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.
✓
Use object replication with a minimum RPO of 15 minutes and configure read-access in the secondary region
Static NAT maps one inside address to one outside address.
✗
Use RA-GRS (read-access geo-redundant storage) and configure storage account failover
Why it's wrong here
Failover is manual and may take hours.
✗
Use GRS (geo-redundant storage) with automated failover
Why it's wrong here
No read access in secondary region; automated failover is not available for GRS.
✗
Use GZRS (geo-zone-redundant storage) with customer-managed failover
Why it's wrong here
Customer-managed failover can take up to 1 hour, but RPO may exceed 15 minutes.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-305 question in full detail.
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.
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: Use object replication with a minimum RPO of 15 minutes and configure read-access in the secondary region — Option D is correct because object replication with a minimum Replication Time Objective (RTO) of 15 minutes meets the RPO requirement, and a secondary read-access region meets the RTO of 1 hour. Option A is wrong because RA-GRS has an RPO of 15 minutes but failover is manual and may take longer. Option B is wrong because GZRS with manual failover may exceed RTO. Option C is wrong because geo-redundant storage (GRS) does not provide read access in the secondary region.
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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