AZ-104 Question 79
Single answerAn e-commerce company is hosting mission-critical data in Azure. They require the highest availability and durability across multiple Availability Zones, and they also want read access to their data if the primary region becomes unavailable. Which storage redundancy option should they choose?
- A
Locally Redundant Storage (LRS)
- B
Geo-Redundant Storage (GRS)
- C
Geo-Zone-Redundant Storage (GZRS)
- D
Read-Access Geo-Zone-Redundant Storage (RA-GZRS)
Show answer and explanation
Correct answer: D
Explanation
Read-Access Geo-Zone-Redundant Storage (RA-GZRS) extends the benefits of zone-level resiliency by replicating data across different zones and ensuring data is also geo-redundant. Additionally, it allows read access in the event the primary region is offline, fulfilling both maximum availability and data protection requirements.
- A. Incorrect.
Replicates data three times within a single data center, providing limited protection and no secondary region replication.
- B. Incorrect.
Replicates data to a secondary region but does not use multiple Availability Zones within the primary region, and it doesn't allow read access to your secondary data while the primary is online.
- C. Incorrect.
Replicates data across multiple Availability Zones in the primary region and also to a secondary region, but does not allow you to read from the secondary region while the primary is online.
- D. Correct.
Combines zone-redundant replication in the primary region with replication to a secondary region and provides immediate read access to the secondary region if the primary becomes unavailable.