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You plan to deploy several Azure virtual machines.
You need to ensure that the services running on the virtual machines are available if a single data center fails.
Solution: You deploy the virtual machines to two or more resource groups.
Does this meet the goal?
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A. B.B
A resource group is a logical container for Azure resources. When you create a resource group, you specify which location to create the resource group in.
However, when you create a virtual machine and place it in the resource group, the virtual machine can still be in a different location (different datacenter).
Therefore, creating multiple resource groups, even if they are in separate datacenters does not ensure that the services running on the virtual machines are available if a single data center fails.
https://docs.microsoft.com/en-us/azure/azure-resource-manager/management/overview#resource-groupsThe solution provided in the question does not meet the stated goal of ensuring availability of services running on the virtual machines if a single data center fails.
Deploying virtual machines to two or more resource groups will not provide high availability or disaster recovery in the event of a data center failure. Resource groups are logical containers for resources that share a common lifecycle and policy, and they can be used to organize resources for management and billing purposes. However, they are not designed to provide high availability or disaster recovery capabilities.
To ensure high availability and disaster recovery, you should deploy virtual machines in an availability set or an availability zone.
Availability sets are used to ensure that virtual machines are placed in different fault domains and update domains. Fault domains represent the physical servers and network switches in a data center that share a common power source and network connectivity. Update domains represent groups of virtual machines that are updated together during maintenance events to ensure that not all virtual machines are unavailable at the same time. By deploying virtual machines in different fault domains and update domains within an availability set, you can ensure that the virtual machines are isolated from each other and have a higher level of availability.
Availability zones are used to ensure that virtual machines are placed in different data centers within the same region. Each availability zone is an independent data center with its own power source, network connectivity, and cooling systems. By deploying virtual machines across availability zones, you can ensure that the virtual machines are isolated from each other and have a higher level of availability and disaster recovery.
Therefore, the correct solution to ensure availability of services running on the virtual machines if a single data center fails is to deploy virtual machines in an availability set or an availability zone.
The correct answer is C. public.
In a public cloud model, the hardware resources are owned by a third-party cloud service provider and are shared between multiple tenants. This means that customers or tenants of the cloud service provider do not own the physical infrastructure, but they rent or subscribe to the use of virtualized resources, such as servers, storage, and networking, provided by the cloud service provider.
In a public cloud, the cloud service provider is responsible for maintaining the physical infrastructure, ensuring security and availability, and managing the underlying hardware and software. Customers or tenants, on the other hand, are responsible for managing their own applications, data, and access controls within the cloud environment.
The public cloud model offers several benefits, such as scalability, cost-effectiveness, and ease of use. Since the resources are shared, customers can easily scale up or down their usage based on their needs, without having to invest in their own hardware. Additionally, the cloud service provider can achieve economies of scale, which enables them to offer services at a lower cost than traditional IT infrastructure.
In contrast, private and hybrid cloud models involve varying degrees of ownership and control over the underlying hardware resources. Private clouds are owned and operated by a single organization, while hybrid clouds combine the use of private and public cloud resources.