AZ-700 Question 195
Single answerYou have deployed a Standard Azure Load Balancer in the East US region to handle internal traffic for a business application. The application� virtual machines (VMs) are organized in two separate subnets (WebSubnet and AppSubnet) but reside in the same virtual network. You want to create a single back-end pool to evenly distribute traffic across all these VMs. Which configuration should you choose to properly create the back-end pool?
- A
Create two separate back-end pools, one for each subnet, and configure the load balancer to split traffic accordingly.
- B
Create a single back-end pool and directly add the network interface cards (NICs) of all VMs in both subnets.
- C
Create a back-end pool referencing only the first subnet; attach a second load balancer for the other subnet to ensure traffic distribution.
- D
Create a single back-end pool but only include the VMs from the subnet hosting the primary IP address.
Show answer and explanation
Correct answer: B
Explanation
With Standard Azure Load Balancers, you can create a single back-end pool that spans multiple subnets in the same virtual network, provided all resources are in the same region. This design simplifies load balancing and ensures an even distribution of traffic to all VMs. Reference: Microsoft Docs on creating back-end pools (https://learn.microsoft.com/azure/load-balancer/backend-pool-management).
- A. Incorrect.
Option 1: Incorrect. While you can configure multiple back-end pools, a Standard Azure Load Balancer can distribute traffic across multiple subnets within the same virtual network, so there� no need to maintain separate pools if the goal is a single distribution method.
- B. Correct.
Option 2: Correct. Standard Azure Load Balancers allow you to add VMs from different subnets in the same virtual network to a single back-end pool. By referencing the NICs from all VMs in both subnets, traffic is distributed evenly across all nodes.
- C. Incorrect.
Option 3: Incorrect. You don�t need two load balancers just because you have two subnets. A single Standard Load Balancer can handle back-end resources across multiple subnets as long as they are in the same region and virtual network.
- D. Incorrect.
Option 4: Incorrect. You can add VMs from both subnets to the same back-end pool; limiting the pool to only one subnet or only the primary IP subnet would prevent traffic from being distributed across all VMs.