Examkin

Question

Difficulty: HardConfigure Azure Load Balancer

An administrator is configuring a public load balancer to distribute traffic to three virtual machines:

* VM1 and VM2, which are in an Availability Set named AS1
* VM3, which is a standalone virtual machine

All virtual machines are located in the same virtual network and subnet.

The administrator has created a Standard SKU public IP address named Pub-IP1 and a Basic SKU load balancer named LB1.

You need to identify the configuration changes required to load balance incoming internet traffic across VM1, VM2, and VM3 using Pub-IP1.

Which two actions should you perform? (Choose two.)

  1. Deploy a Standard SKU load balancer.Answer
  2. Associate Pub-IP1 with the frontend IP configuration of the Standard SKU load balancer.Answer
  3. C
    Associate Pub-IP1 with the frontend IP configuration of the existing Basic SKU load balancer (LB1).
  4. D
    Configure the backend pool of the existing Basic SKU load balancer (LB1) to include both the virtual machines in AS1 and the standalone virtual machine VM3.

Answer

Deploy a Standard SKU load balancer, and associate Pub-IP1 with the frontend IP configuration of the Standard SKU load balancer.
To support load balancing across a mixed pool of standalone virtual machines and virtual machines in an availability set, and to utilize a Standard SKU public IP address, a Standard SKU load balancer is required. The Standard SKU public IP address must then be associated with the frontend IP configuration of this Standard SKU load balancer.

Step-by-Step Solution

1
Analyze the SKU compatibility of the public IP address and the load balancer.
Identify that the public IP (Pub-IP1) is Standard SKU, while the existing load balancer (LB1) is Basic SKU. These SKUs are incompatible.
Azure requires the Public IP SKU to match the Load Balancer SKU.
2
Analyze the backend pool requirements for the virtual machines.
Identify that the virtual machines are a mix of an availability set (AS1) and a standalone VM (VM3). A Basic SKU load balancer cannot support this configuration in its backend pool.
Basic SKU load balancers only support virtual machines within a single availability set or virtual machine scale set in their backend pool.
3
Determine the required load balancer SKU to support both the Standard public IP and the mixed backend pool configuration.
Determine that a Standard SKU load balancer must be deployed.
Standard SKU load balancers support Standard public IPs and allow any virtual machines in a single virtual network to be added to the backend pool.
4
Determine the frontend IP configuration action.
Associate Pub-IP1 with the frontend IP configuration of the Standard SKU load balancer.
This binds the incoming public traffic destination to the new Standard SKU load balancer.

Key Concept

Azure Load Balancer SKU features and compatibility constraints
Rate this question

Topics

Configure Azure Load Balancer

More questions from this topic