You plan to deploy a service to Azure virtual machines.
You need to ensure that the service will be available if a datacenter fails.
What should you use as part of the virtual machine deployment?
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A. B. C. D.D
Azure availability zones are physically separate locations within each Azure region that are tolerant to local failures. Failures can range from software and hardware failures to events such as earthquakes, floods, and fires. Tolerance to failures is achieved because of redundancy and logical isolation of Azure services. To ensure resiliency, a minimum of three separate availability zones are present in all availability zone-enabled regions.
https://docs.microsoft.com/en-us/azure/availability-zones/az-overviewThe correct answer to the question is D. Azure Advisor.
Azure Advisor is a free Azure service that provides personalized and proactive recommendations to optimize Azure resources based on industry best practices. It analyzes a company's usage of Azure resources and provides recommendations on how to improve the performance, security, and high availability of those resources.
Azure Advisor provides recommendations in several categories, including cost optimization, security, performance, and availability. These recommendations are based on industry best practices and the usage of Azure resources by the company. For example, it may recommend the use of a more cost-effective virtual machine size or the implementation of security measures to protect sensitive data.
Azure Monitor, Azure Service Health, and Application Insights in Azure Monitor are also Azure services, but they have different purposes. Azure Monitor is a monitoring and analytics service that collects and analyzes data from Azure resources to provide insights into their performance and usage. Azure Service Health provides information about the health and availability of Azure services and regions. Application Insights in Azure Monitor is a monitoring and diagnostics service for web applications.
While these services can provide valuable insights into a company's cloud usage, they do not directly compare a company's cloud usage to industry standard best practices. Therefore, the correct answer to the question is D. Azure Advisor.
To ensure high availability of virtual machines (VMs) in Azure, you should use availability sets or availability zones.
Availability sets are a feature that allows you to group VMs in a way that makes them more fault-tolerant. An availability set is a logical grouping of VMs that are deployed across multiple physical servers in a datacenter. By spreading your VMs across multiple physical servers, you can ensure that if one server fails, your service will still be available. When you create an availability set, Azure ensures that the VMs are deployed to different fault domains and update domains. Fault domains are groups of servers that share a common power source and network switch. Update domains are groups of servers that are updated together during maintenance events. By deploying your VMs across multiple fault domains and update domains, you can ensure that your service remains available even during maintenance events.
Availability zones are a feature that provides an even higher level of fault tolerance than availability sets. Availability zones are physically separate datacenters within an Azure region. Each availability zone is composed of one or more datacenters that are located within a few miles of each other. By deploying your VMs across multiple availability zones, you can ensure that your service remains available even if an entire datacenter goes offline. When you create VMs in an availability zone, Azure automatically deploys them across multiple fault domains and update domains within that zone.
Proximity placement groups and host groups are not directly related to high availability. Proximity placement groups allow you to group VMs together in a way that maximizes network latency, while host groups allow you to group VMs together on specific physical hosts. While these features can be useful for optimizing performance and resource allocation, they do not provide any additional fault tolerance.
Therefore, the correct answer to ensure the service will be available if a datacenter fails is D. availability zones.