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Difficulty: EasyCreate and Configure Virtual Machines

You are deploying three Azure virtual machines that will run a load-balanced application. You configure the virtual machines within an Availability Set. Which type of failure or disruption does this configuration protect the application against?

  1. Localized hardware failures within a single datacenterAnswer
  2. B
    A complete outage of an entire datacenter facility
  3. C
    Accidental deletion of the virtual machine resources by an administrator
  4. D
    An unexpected surge in traffic that requires automatic horizontal scaling of instances

Answer

Localized hardware failures within a single datacenter
An Availability Set distributes virtual machines across multiple fault domains (racks with shared power and network) and update domains (groups that can be rebooted during maintenance) within a single datacenter. This protects the application against localized hardware failures or planned Azure maintenance within that datacenter.

Step-by-Step Solution

1
Analyze the virtual machine configuration option used in the scenario.
The scenario uses an Availability Set for the three virtual machines.
Understanding the capability of the chosen availability feature is necessary to determine what it protects against.
2
Differentiate between the redundancy levels of Availability Sets and Availability Zones.
Availability Sets provide redundancy within a single datacenter (across power and network boundaries), while Availability Zones provide redundancy across different physical datacenters in the same region.
This helps rule out datacenter-level failures as a protection capability of Availability Sets.
3
Identify the correct capability that matches Availability Sets.
Availability Sets protect against localized hardware failures within a single datacenter.
This matches the definition of fault domains and update domains provided by Availability Sets.

Key Concept

Azure Virtual Machine availability options and the distinction between Availability Sets and Availability Zones
Estimated Time:45s
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Topics

Create and Configure Virtual Machines

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