Azure DNS and Azure Stack Hub DNS varies in terms of ways how they handle tags, Etags, metadata, and Limits along with some other key differences.Which of the following is used by the Azure Stack Hub DNS for safely handling the concurrent changes or modifications to the same resource?
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A. B. C. D.Correct Answer: B
Etags are used by Azure Stack Hub DNS for safely handling the concurrent changes or modifications to the same resource.
There is an Etag associated with every DNS resource (record set or Zone) and when a resource is updated, it regenerates the Etag.
The mismatch of Etag shows the occurrence of a concurrent change.
Option A is incorrect.
These are Etags, not tags, that are used by Azure Stack Hub DNS for safely handling the concurrent changes or modifications to the same resource.
Option B is correct.
Etags are used by Azure Stack Hub DNS for safely handling the concurrent changes or modifications to the same resource.
Option C is incorrect.
Metadata helps in recording the purpose of every record set.
These are Etags, not Metadata, that is used by Azure Stack Hub DNS for safely handling the concurrent changes or modifications to the same resource.
Option D is incorrect.
Etags, not limits are used by Azure Stack Hub DNS for safely handling the concurrent changes or modifications to the same resource.
To know more about DNS in Azure Stack Hub, please visit the below-given link:
Azure Stack Hub DNS and Azure DNS are both DNS (Domain Name System) services offered by Microsoft, but they have some differences in their functionality and features. One of the key differences between these two services is the way they handle concurrent changes or modifications to the same resource.
In Azure Stack Hub DNS, the mechanism used for safely handling concurrent changes to the same resource is called Etags. Etags (Entity Tags) are HTTP headers that are used to determine whether a resource has been modified since the last time it was accessed. An Etag is a unique identifier assigned by the server to a specific version of a resource, and it changes whenever the resource is modified.
When a client makes a request to Azure Stack Hub DNS to modify a resource, the server checks the Etag of the resource to determine if it has been modified by another client since the last time the requesting client accessed it. If the Etag has changed, the server returns an HTTP 412 error code, indicating that the resource has been modified and the client needs to retrieve the latest version of the resource before attempting to modify it again.
By using Etags, Azure Stack Hub DNS ensures that multiple clients can safely make changes to the same resource without interfering with each other. This helps to prevent data corruption and ensures that all changes are properly recorded and tracked.
In contrast, Tags are not used for safely handling concurrent changes or modifications to the same resource in Azure Stack Hub DNS. Tags are used for organizing and categorizing resources in Azure, but they do not provide any concurrency control mechanism. Similarly, metadata and limits are not used for handling concurrent changes or modifications to the same resource in Azure Stack Hub DNS, but rather provide additional information about the resource and its usage.
Therefore, the correct answer to the question is B. Etags.