A company runs a critical multi-tier application on Azure VMs. The application includes a database tier that requires recovery across multiple VMs at the same point in time. The company uses Azure Site Recovery (ASR) for disaster recovery to a secondary region. The recovery point objective (RPO) is 15 minutes and the recovery time objective (RTO) is 1 hour. The database VMs have a high data change rate, and the company wants to minimize replication costs. Which combination of ASR configurations should they implement?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
Best answer
Use multi-VM consistency groups and set the replication frequency to 15 minutes.
Multi-VM consistency groups ensure crash-consistent recovery of all VMs to the same point. Setting replication frequency to 15 minutes meets the RPO and reduces the number of recovery points, lowering storage and network costs compared to the default 5-minute frequency.
Distractor review
Enable application-consistent recovery for all VMs and use ExpressRoute.
Application-consistent recovery incurs additional overhead and cost; ExpressRoute improves network reliability but does not minimize replication costs.
Distractor review
Use standard recovery plans and default replication policy.
Default replication creates recovery points every 5 minutes, which may be more frequent than needed and incurs higher costs without meeting the consistency requirement across VMs.
Distractor review
Configure a single recovery plan with manual failover and use Premium SSD managed disks.
Manual failover does not ensure consistent recovery points across VMs, and Premium SSD increases cost without addressing the RPO or consistency.
Common exam trap
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.
Technical deep dive
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.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A company is designing hub-and-spoke networking. Spoke VNets must use a central Azure Firewall for outbound internet traffic. Which two configurations are required?
Question 2
A company is designing private access to a PaaS database from workloads in a VNet. The database should not be reachable over its public endpoint. What should be recommended?
Question 3
A data platform must support analytical queries over petabytes of files in a data lake, while preserving hierarchical namespaces and fine-grained ACLs. Which storage service should you design around?
Question 4
A database workload has an RPO of 15 minutes and an RTO of 4 hours. Cost is more important than near-zero data loss. Which design is usually more appropriate than synchronous multi-region replication?
Question 5
A hub-and-spoke Azure network must centralize outbound inspection and still allow spokes to resolve private endpoint DNS names. Which two components are commonly required? (Choose 2.)
Question 6
A multinational company uses Microsoft Entra ID and several Azure subscriptions. Security administrators need to review privileged role assignments every month and require justification for continued access. Which design should be recommended?
FAQ
Questions learners often ask
What does this AZ-305 question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Use multi-VM consistency groups and set the replication frequency to 15 minutes. — Multi-VM consistency groups ensure crash-consistent recovery of all VMs to the same point. Setting replication frequency to 15 minutes meets the RPO and reduces the number of recovery points, lowering storage and network costs compared to the default 5-minute frequency. Application-consistent recovery adds overhead and cost. Default policies create more frequent recovery points, increasing costs. Manual failover does not ensure consistency.
What should I do if I get this AZ-305 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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