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Difficulty: EasyConfigure Azure Load Balancer

You are configuring a public load balancer in Azure to distribute incoming internet traffic across two virtual machines. You have already created a Standard SKU public IP address to be used for the frontend.

Which of the following configuration options are compatible with this setup? (Select two.)

  1. Create a Standard SKU load balancer and associate the existing Standard SKU public IP address with its frontend.Answer
  2. Add virtual machines deployed in different Availability Zones to the backend pool of the Standard SKU load balancer.Answer
  3. C
    Create a Basic SKU load balancer and associate the existing Standard SKU public IP address with its frontend.
  4. D
    Add virtual machines configured with Basic SKU public IP addresses on their network interfaces to the backend pool of the Standard SKU load balancer.

Answer

To configure a compatible architecture, you must create a Standard SKU load balancer to match the Standard SKU public IP address, and you can add virtual machines from different Availability Zones to its backend pool.
Standard SKU public IP addresses can only be bound to Standard SKU load balancers. Standard SKU load balancers support backend resources spanning multiple availability zones, ensuring high availability.

Step-by-Step Solution

1
Determine the required Load Balancer SKU based on the frontend IP address.
The frontend IP is Standard SKU, which mandates a Standard SKU load balancer.
Azure does not support mixing SKUs between the public IP frontend and the load balancer instance itself.
2
Verify backend pool virtual machine distribution rules for the Standard SKU load balancer.
The Standard SKU load balancer supports virtual machines distributed across multiple Availability Zones.
Standard load balancers offer zone-redundancy and zone-spanning backend pools, unlike Basic load balancers.
3
Evaluate the IP configuration requirements of individual virtual machine NICs in the backend pool.
All public IPs assigned to the NICs of the backend VMs must match the Standard SKU of the load balancer.
Mixing Basic SKU public IPs on backend virtual machines with a Standard SKU load balancer is unsupported.

Key Concept

Azure Load Balancer SKU alignment and backend pool zone capabilities
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Topics

Configure Azure Load Balancer

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