Examkin

Question

Difficulty: HardConfigure VMs for High Availability

Apex Genomics plans to deploy a new critical genomic sequencing analysis portal. The application tier will consist of four virtual machines. The design must meet the following requirements:
- Protect the application tier from datacenter-level failures.
- Provide a 99.99%99.99\% SLA for the virtual machines.
- Support load balancing using an Azure Load Balancer.

You need to configure the virtual machines for high availability.

Which two configurations should you implement? (Select two.)

  1. Deploy the virtual machines across multiple Availability Zones in the West US 3 region.Answer
  2. Associate the virtual machines with a Standard SKU Azure Load Balancer.Answer
  3. C
    Deploy the virtual machines in a single Availability Set configured with three fault domains.
  4. D
    Configure a Basic SKU Azure Load Balancer to distribute traffic to the virtual machines.
  5. E
    Deploy the virtual machines in a single Availability Set and span the Availability Set across multiple Availability Zones.

Answer

Deploy the virtual machines across multiple Availability Zones in the West US 3 region, and associate the virtual machines with a Standard SKU Azure Load Balancer.
To protect against datacenter-level failures and achieve a 99.99%99.99\% SLA, virtual machines must be deployed across physically separate Availability Zones. Additionally, because the VMs are deployed across different Availability Zones, a Standard SKU Azure Load Balancer must be used since the Basic SKU does not support cross-zone backend distribution.

Step-by-Step Solution

1
Analyze the high availability and SLA requirements.
Datacenter-level protection and a 99.99%99.99\% SLA require deploying virtual machines across physically isolated Availability Zones rather than logical Availability Sets.
Availability Zones provide isolation against datacenter failures and guarantee a 99.99%99.99\% SLA, whereas Availability Sets only protect against rack-level/hardware failures within a single datacenter and offer a 99.95%99.95\% SLA.
2
Determine the load balancing requirements for zonal VM deployments.
A Standard SKU Azure Load Balancer is selected.
Basic SKU Load Balancers cannot distribute traffic to virtual machines residing in multiple Availability Zones, making Standard Load Balancer mandatory for zone-redundant backend configurations.

Key Concept

Azure virtual machine high availability configurations: Availability Zones provide datacenter-level redundancy and a 99.99%99.99\% SLA, which requires a Standard SKU Load Balancer.
Rate this question

Topics

Configure VMs for High Availability

More questions from this topic