You have an Azure subscription that contains web apps in three Azure regions.
You need to implement Azure Key Vault to meet the following requirements:
✑ In the event of a regional outage, all keys must be readable.
✑ All the web apps in the subscription must be able to access Key Vault.
✑ The number of Key Vault resources to be deployed and managed must be minimized.
How many instances of Key Vault should you implement?
Correct Answer: A
The contents of your key vault are replicated within the region and to a secondary region at least 150 miles away but within the same geography. This maintains high durability of your keys and secrets. See the Azure paired regions document for details on specific region pairs.
Example: Secrets that must be shared by your application in both Europe West and Europe North. Minimize these as much as you can. Put these in a key vault in either of the two regions. Use the same URI from both regions. Microsoft will fail over the Key Vault service internally.