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Difficulty: MediumConfigure Azure Load Balancer

You plan to configure a Standard SKU public Azure Load Balancer named LB1. LB1 will distribute incoming internet traffic to two virtual machines named VM1 and VM2. VM1 and VM2 are standalone virtual machines deployed in the same virtual network, and they are not part of an Availability Set or Virtual Machine Scale Set. You need to configure the frontend IP address and the backend pool for LB1. Which two actions should you perform? (Select two.)

  1. Create a Standard SKU public IP address and associate it with the frontend IP configuration of LB1.Answer
  2. B
    Create a Basic SKU public IP address and associate it with the frontend IP configuration of LB1.
  3. Add the network interfaces of VM1 and VM2 directly to the backend pool of LB1.Answer
  4. D
    Place VM1 and VM2 into an Availability Set before adding them to the backend pool.

Answer

To configure a Standard SKU public load balancer for standalone virtual machines, you must create a Standard SKU public IP address for the frontend configuration, and you can add the network interfaces of the virtual machines directly to the backend pool.
For a Standard SKU public load balancer, the frontend IP address configuration must use a Standard SKU public IP address. Additionally, the Standard SKU load balancer allows standalone virtual machines within the same virtual network to be added directly to the backend pool via their network interfaces (NICs). Placing the virtual machines in an availability set or virtual machine scale set is not required.

Step-by-Step Solution

1
Select the appropriate public IP address SKU for the Standard Load Balancer.
A Standard SKU public IP address is selected, as Standard Load Balancers do not support Basic SKU public IP addresses.
Azure requires matching SKUs between the public IP resource and the load balancer resource.
2
Determine how standalone virtual machines can be added to the backend pool of a Standard Load Balancer.
The network interfaces of VM1 and VM2 can be directly associated with the backend pool.
Standard SKU Load Balancers support adding any virtual machines from the same virtual network to the backend pool, unlike Basic SKU Load Balancers which require the VMs to belong to an Availability Set or Virtual Machine Scale Set.

Key Concept

SKU compatibility and configuration rules for Standard Azure Load Balancers.
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Topics

Configure Azure Load Balancer

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