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Difficulty: MediumConfigure Azure Load Balancer

An administrator is configuring a public load balancer in Azure. The backend pool must include three virtual machines that are currently deployed across three different Availability Zones in the East US region. The administrator has already created a Basic SKU public IP address for the frontend. When configuring the load balancer, the administrator is unable to select the virtual machines for the backend pool. Which of the following configuration adjustments is required to successfully configure the load balancer to distribute traffic to these virtual machines?

  1. A
    Deploy a Basic SKU load balancer and associate the existing Basic SKU public IP address with it.
  2. B
    Deploy a Basic SKU load balancer and associate a new Standard SKU public IP address with it.
  3. Deploy a Standard SKU load balancer and associate a new Standard SKU public IP address with it.Answer
  4. D
    Deploy a Standard SKU load balancer and associate the existing Basic SKU public IP address with it.

Answer

Deploy a Standard SKU load balancer and associate a new Standard SKU public IP address with it.
Deploying a Standard SKU load balancer and associating a new Standard SKU public IP address with it is correct because Standard SKU load balancers are required to support backend resources distributed across multiple Availability Zones. Additionally, Standard SKU load balancers require Standard SKU public IP addresses for their frontend configurations.

Step-by-Step Solution

1
Analyze backend virtual machine placement constraints.
The virtual machines are distributed across multiple Availability Zones, which requires a Standard SKU load balancer since Basic SKU load balancers do not support zone-redundant or cross-zone backend pools.
To identify which Load Balancer SKU supports backend instances in multiple Availability Zones.
2
Identify frontend IP configuration SKU requirements based on the load balancer SKU.
A Standard SKU load balancer requires a Standard SKU public IP address for its frontend IP configuration. Basic SKU public IP addresses are incompatible with Standard SKU load balancers.
To ensure SKU alignment between the frontend IP configuration and the load balancer resource.
3
Select the correct combination of load balancer SKU and public IP SKU.
Deploying a Standard SKU load balancer with a Standard SKU public IP address meets all architectural requirements.
To successfully configure the load balancer and resolve the backend pool association issue.

Key Concept

Azure Load Balancer SKU compatibility and Availability Zone support
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Topics

Configure Azure Load Balancer

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